Seiko Caliber 6r35

Seiko Caliber 6R35

Seiko Caliber 6r35a

Manufacturer Seiko
Caliber Number 6R35, 6R35A
Movement Type Automatic
Diameter 27.40mm (needs confirmed)
Casing Diameter
27mm (needs confirmed)
Height 5.25mm (needs confirmed)
Jewels 24
Vibrations Per Hour
21,600 bph
Lift Angle
53 degrees
Shock System? Diashock
Mainspring Spron 510 (needs confirmed)
Regulation
ETACHRON
Power Reserve
~70 hours
Rotor Direction
Bi-directional (Magic Lever)
Hacking? Yes
Hand-Windable? Yes
Magnetic Resistance
4,800 A/m (60 gauss)
Functions Hours, minutes, central second hand, date at 3:00
Country of Manufacture Japan
Known Models
Presage models: SPB127, SPB131, SPB129, SPB115, SBP113, SPB095 (Arita), SPB111 / Prospex Alpinist: SPB117 (SBDC087), SPB119 (SBDC089), SPB121 (SBDC091), SPB123 (SBDC093) / Prospex “Sumo”: SPB101, SPB103, SPB125 (Add more in the comments below)

The Seiko caliber 6R35 is an automatic movement that is part of what Seiko refers to as the high performance 6R series caliber. The 6R35 is considered an upgrade from the caliber 6R15. Watches with the 6R35, such as the Presage Arita Porcelain were announced at Baselworld 2019. The Prospex SPB149 powered by the 6R35 was announced in March 2020.

6R15 VS 6R35:

The caliber 6R35 is beginning to find its way into watches that used to house the 6R15. The biggest difference between the two movements is a 20 hour increase in power reserve. The 6R15 has a power reserve of approximately 50 hours and the 6R35 has a power reserve of approximately 70 hours.

6R35 / 6R35A / 6R35B / 6R35C:

This is still a rather new movement, so currently there is only the 6R35A. The general caliber number is 6R35, with 6R35A being the first version. The subsequent letter variations indicate evolution stages in the movements development. This post will be updated if the movement gets any upgrades.

Accuracy of the 6R35:

Seiko claims the accuracy of the caliber 6R35 has a rating of -15/+25 seconds per day in normal temperature conditions (between 5 – 35 degrees C).

Seiko says this about accuracy:

  • The accuracy of mechanical watches may not fall within the specified range of time accuracy because of loss/gain changes due to the conditions of use, such as the length of time during which the watch is worn on the wrist, arm movement, whether the mainspring is wound up fully or not, etc.
  • The key components in mechanical watches are made of metals which expand or contract depending on temperatures due to metal properties. This exerts an effect on the accuracy of the watches. Mechanical watches tend to lose time at high temperatures while they tend to gain time at low temperatures.
  • In order to improve accuracy, it is important to regularly supply energy to the balance that controls the speed of the gears. The driving force of the mainspring that powers mechanical watches varies between when it is fully wound and immediately before it is unwound. As the mainspring unwinds, the force weakens.
  • Relatively steady accuracy can be obtained by wearing the watch on the wrist frequently for the self-winding type and winding up the mainspring fully everyday at a fixed time to move it regularly for the wind-up mechanical type.
  • When affected by external strong magnetism, a mechanical watch may loss/gain time temporarily. The parts of the watch may become magnetized depending on the extent of the effect. In such a case, consult the retailer from whom the watch was purchased since the watch requires repair, including demagnetizing.

Power Reserve:

The caliber 6R35 holds a power reserve of at least 70 hours. To fully wind the mainspring, turn the crown a minimum of 55 times.

Crown Position Functions:

0 (against the case): Clockwise = Manual Winding / Counterclockwise = Nothing
1 (pulled out one click): Clockwise = Nothing / Counterclockwise = Date setting
2 (pulled out two clicks): Time setting clockwise and counterclockwise

Can you overwind the movement?

No. According to the Seiko documentation, manually winding the movement after it is already fully wound will not break the spring.

When can you adjust the date?

Do not adjust the date between 9:00 PM and 1:00 AM.

Stem Removal:

To remove the stem, make sure the crown is in position 0 or normal position (not date or time setting position). There is a lever with a small indentation for your tool. Gently press down while pulling the stem out. See official instructions below for more guidance:

Seiko Caliber 4r36 Stem Removal

How often does the 6R35 need serviced?

According to official Seiko documentation, watches with the caliber 6R35 should be serviced every 2-3 years. Learn all about Seiko service intervals here. At the time of this post, the starting cost of getting this movement overhauled by Seiko is $260.00 USD.

Examples of watches with caliber 6R35:

Additional Resources:

  • Seiko 6R35 official instruction manual here
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Jyrgen N
Jyrgen N
3 years ago

The 6R35 is also in the SPB113J1 (Presage with white enamel dial) I bought two weeks ago. So far I have observed deviations from +3 to -3 s per day; the day I saw the latter may have been one with very little activity. So far I am as happy with the caliber as with the watch in general, meaning *very* happy.

Jyrgen N
Jyrgen N
3 years ago
Reply to  Jyrgen N

The above was during a time when I had relatively little activity during staycation. In between I have seen that in a normal work week the clock gains about 20 seconds, meaning around +3 seconds per day on average. Good!

Don Jones
Don Jones
3 years ago

It’s also in the new SPB151 & SPB153 models

Bryan W
Bryan W
3 years ago

Also in the SBDC101/SPB143 series MAS62 reissue watches.

Gareth Davies
Gareth Davies
3 years ago

With regard to my SPB143J1, I am getting +15 seconds a day. Quite disappointed really.

zeke
zeke
3 years ago
Reply to  Gareth Davies

that will slow down over a month run in time…i have spb149 and for the first few days it was +1 a day now afther 3 weeks of 24/7 wear its now -10 per day

Gareth Davies
Gareth Davies
3 years ago
Reply to  zeke

Alas, after two weeks my watch was gaining up to 28 secs a day. Spoke directly to Seiko, who asked me to return the watch for adjustment and have subsequently written to me explaining they will rectify any defects, but it will take at least 3 weeks to test the watch properly. Will keep you posted as how the watch performs once returned to me.

Gareth Davies
Gareth Davies
3 years ago
Reply to  Gareth Davies

Received my watch back from Seiko after 4 weeks. They have replaced the entire movement, all under warranty. It’s currently gaining gaining plus 9 secs a day, but hopefully it will bed in and improve. Fingers crossed

Simon
Simon
3 years ago
Reply to  Gareth Davies

But a demagnetiser from eBay for £6. 9 times out of 10 that will sort it. Do you ever have your watch near your mobile?

JY
JY
3 years ago
Reply to  Gareth Davies

I have the SPB147 and find it running fast around +30/day wearing it daily for the week. It’s a new piece so I’m hoping for better results as it goes along. Disappointed so far though. I might need to call Seiko.

Simon
Simon
3 years ago
Reply to  Gareth Davies

I have a couple of Grand Seiko hi beats and a spring drive. I have just got a presage Alpinist (which has the 6R35a). It’s only 5 secs slow after four days of wearing. Try not taking yours off. If it’s running fast it may need de-magnetising. Or it’s you. Not much you can do about that. Anyway. That movement should be performing better than you are getting.

Eric O.
Eric O.
3 years ago
Reply to  Gareth Davies

I don’t understand being disappointed with +15 seconds per day when the 6R is rated as -15/+25 seconds per day by Seiko. Why do people expect COSC performance with watches that are advertised with a range of 40 seconds.

John Hayes
John Hayes
2 years ago
Reply to  Eric O.

I agree totally, a AU 1.5 k Seiko SPB143j is not a 3.0k Ball Chronometer, or a 4.0k Longines Spirit Chronometer. I know because I have all three, Perfection is a Longines reissue VHP Conquest Quartz if one wishes to blow 2k on Sat/Nav Quartz , that’s fine but never demand perfection of an imperfect thing, the nature of an Automated movement hand made can never achieve perfection, much like people and nature itself that’s why I like them . Donate regularly to the HSI like I do and we can all get an appreciation of imperfection and refreshing nature… Read more »

H2ITO
H2ITO
2 years ago
Reply to  Eric O.

In addition to my SPB153, 239,… I have 4 Rolexes, 1 Reverso, Bell & Ross (2). COSC Rolex is solid, reliable. Seiko, not so much. JLC “tests” for 1000 hours (in case), Reverso is uneven, don’t wear too much, safe queen.

Kepavi
Kepavi
5 months ago
Reply to  H2ITO

You didn’t just compared a $700 MSRP watch with a $20000+ watches? Equivalent would be comparing a Bentley with Fiat 500L.
Just for the sake of it, compare a GS Spring Drive with any other watch and let us know the accuracy results…

Donald
Donald
11 months ago
Reply to  Gareth Davies

I bought a Sarx075 with this movement a couple months ago, and it gained about 30 seconds a day when I got it. I’m pretty dissatisfied seeing as two months later it’s now gaining a minute a day.

Venkat
Venkat
6 months ago
Reply to  Donald

How is it performing now?

Alberto
Alberto
2 months ago
Reply to  Donald

I fully agree with you, I’ve an Alpinist and an SPB317, so not so cheap watches, they are gaining more than 1 minute a day. I do not expect the precidion of a quartz, but…

trackback
Reseña SEIKO SPB143 – SaFonaGastroCrono
3 years ago

[…] finalizar hablaré de su calibre, el movimiento automático 6R35, la evolución del 6R15. Ha aumentado su reserva de marcha hasta las 70 horas y su latido es de […]

Benjamin Kingsmill
Benjamin Kingsmill
3 years ago

It gains too much time in a day! I’m constantly readjusting it, wish it was a quartz! So disappointed for an £740 watch!

Benjamin Kingsmill
Benjamin Kingsmill
3 years ago
Reply to  calibercorner

Hi, yes I checked to see if my seiko sumo 3rd gen was magnetised with this ‘Lepsi’ app you can download, and it was showing that it is not at all. My watch is only a few months old, I have wound it up fully and then let it unwind all the way down ( which was recommended on another watch site) and then wound it back up and worn it for 3 weeks, it was still gaining over a minute a day!, it was driving me mad constantly correcting it! I read if your watch is running fast to… Read more »

Gareth Davies
Gareth Davies
3 years ago

Ben, if you are in the UK. Speak to Beverly in Seiko customers services. Explain your situation and return the watch to them. If the movement needs changing, they will. She’s very understanding and obliging. Your watch comes with a warranty for a reason. The 6R35 is not bullet proof. I know that and so do Seiko.

Benjamin Kingsmill
Benjamin Kingsmill
3 years ago
Reply to  Gareth Davies

Ahh thanks so much Gareth! Really appreciate this thread and website forum, and speedy assistance!.. I have just wound my watch up again and set it to the speaking clock and I will monitor carefully for a week just so I have definitely got my facts straight and then if still the same, and I see no reason why it won’t be!, I will send it in, from your advice! All the best , and will update as soon as I can, regards Ben.

Myles
Myles
3 years ago

Hi, Ben.

Does the Lepsi app require you to place your watch in close proximity to your phone? If so, that’s an excellent way to *magnetize* a watch movement! Instead, use a small compass, or better yet, buy a cheap demagnetizer and treat the watch empirically with the demagnetizer. It can’t hurt.

Good luck!

Myles

Ben
Ben
3 years ago

so I finally sent my watch off to seiko uk, still under a year warranty and they said the watch had been dropped!… I had not dropped it at all I’m so careful, so they said it needed new parts to the time of £165!! Warranty did not count even though I said from day one the time keeping was abismal!… now I have my watch back and it is more accurate than my submariner .. it’s plus/minus 0 and it has been for 4 days now! I can’t believe it! I set my watch to the speaking clock pips… Read more »

Bari W
Bari W
3 years ago

JUNK. Absolutely junk of a movement. Bought my SBDC101 (aka SPB143) with this 6r35 movement, and the quickset date no longer works… Extremely disappointed in Seiko. Luckily I have warranty, so I will get this watch fixed. I bet they will charge me to ship it over to Japan too. As soon as I get this watch fixed I am going to sell it off… doubt I will ever try another Seiko again. It’s a shame, I really wanted to like Seiko. This is why the Swiss will forever trump this brand.

Laurens vH
Laurens vH
3 years ago
Reply to  Bari W

Dear Bari, I can imagine you are disappointed, but your are now basing your evaluation of the Seiko brand off one bad experience. If I did the same I couldn’t buy any Rolex (misaligned bezel on a GMT Master) or Omega (1 minute a day fast on a Speedmaster) or any watch from any brand for that matter. Sometimes bad ones slip through QC, and sometimes stuff breaks… Seiko’s are (very) good watches and offer reasonable to good value, with great heritage. Grand Seiko is up there with the very best of the Swiss, if you like their style. My… Read more »

Simon
Simon
3 years ago
Reply to  Laurens vH

Completely agree. Seiko are excellent watches. And produce models for all situations. But they are still – despite a shift in the market it’s chasing – mass produced.

If you want better or far more reliable you have to pay for it.

Simon
Simon
3 years ago
Reply to  Bari W

Don’t blame you for being angry. That’s just not right. Unless you have left the watch near a magnetic source. That moment is not good enough for a £1,000 watch but should not be that crap. That said I have several Seiko watches with the 6R35A and none of them perform as poorly as yours. If you want a decent movement I suggest you buy a grand seiko and leave the mass market models to those who don’t really appreciate watchmaking.

Bramley02
Bramley02
2 years ago
Reply to  Bari W

I did thumb up for you. I got the exact issue with 7s25 Ti Samurai back in 2004. Since then, I am a MOD NH fan. Seiko now is a fashion casing maker.

Mike T
Mike T
3 years ago

The book says 20 winds to get it going and no damage done if you over wind. Saw a comment saying 50 winds to max its out. How many winds to do….

Max
Max
3 years ago

Just got an SPB149J1 second hand with blank warranty card. Really liked the look of it and splurged for my first seiko. (too bad it was sold out everywhere pretty fast) Running +45 seconds per day :-(. Will seiko honor their warranty on it or with a blank card I am stuck. Also the bezel feels weird as after the click it still has a bit of play. Is it normal? Has anyone experienced this? After the click you can move it back just a bit and then it has play back and forth to the spot that it had… Read more »

Simon
Simon
3 years ago
Reply to  Max

Just to be clear – as a regular contributor to watch magazines and websites etc – the 6R35A does not have a silicon mainspring. It is made of metal. I guarantee in almost all cases that if your watch with that movement is running fast it’s because you let it get too close to your mobile or radio or some electromag source (of which modern homes are crammed). But a £6 demagnetiser from eBay and stop moaning.

Marvin
Marvin
3 years ago

Does Seiko have a 6R movement with no date/open heart? I know about the 4R71 and the 4R38 but was hoping they have something in the 6R range that has a 70 hour PR. I wish Seiko released more time only watches. Their new bezel-less Alpinists (SPB155J, SPB157J, SPB159J) will look great as time-only pieces. Part of me is daydreaming of SPB156J, SPB158J, SPB160J as references for those.

Marvin
Marvin
1 year ago
Reply to  Marvin

The 6r31 doesn’t have a date and it’s pretty much the same thing

Chris
Chris
3 years ago

I had an issue with the new Alpiniste, the time gain was large and inconsistant, anything from 10s to 60s in a day! The watch was replaced under warranty and the new one is great, less than a minute gained over a week.

Jay J
Jay J
3 years ago

I just got the new SPB153 Captain Willard with the 6r35 movement. Is it normal for the seconds hand to pull back slightly when you set the time counter clockwise? I have 2 3 other Seiko and don’t do that.

Simon
Simon
3 years ago
Reply to  Jay J

Yes. Live with it

Stefan
Stefan
3 years ago
Reply to  Simon

My Rolex did that too!

Jack Daniel
Jack Daniel
3 years ago

I have a 4r15 I’ve had it on a watch winder for a month while I was on away. On average it gained about 4 seconds a day.

Roman garcia
Roman garcia
3 years ago

Hola yo tengo el nuevo sumo verde y la verdad que se tuvo que llevar a servicio pues el remonte manual no funcionaba lo lleve unos días y me daba un promedio de más 3 segundos día aún dejándolo pon la noche en reposo después de arreglarlo me está dando más 6s el tema es que esos seis segundos me los coje de noche cuando me lo quito o aveces duermo con el . No es un promedio malo pero tengo un 4r36 que máximo 1s día si llega me gusta mucho la calidad del reloj pero no me termina… Read more »

Roman garcia
Roman garcia
3 years ago

No se si fue de llevarlo a servicio pero me uviese gustado que saliera con sus más 3s de todas maneras se está diciendo en muchos foros que el calibre está dando muchos problemas de diferentes campos haqui en españa cuesta 900euros unos 1000 dorares por ese precio hoy por hoy hubiese comprado longines hizroconques por 70euros mas

MARK WOLFSON
MARK WOLFSON
3 years ago

Wow, now wondering whether I want to touch this calibre…Was seriously looking at the SPB153J1. I will go back to Yema instead.

Olivirer REINACH
Olivirer REINACH
3 years ago
Reply to  MARK WOLFSON

All brands have their issues! on the Yema superman heritage 63 it seems that there is a lot of problem with the crown which, when unscrewed, wanders and the locked bezel inoperative

MARK WOLFSON
MARK WOLFSON
3 years ago

I agree with you for sure! Maybe we should all protest by buying G-shocks! LOL Have a Happy Thanksgiving.

Olivier
Olivier
3 years ago
Reply to  MARK WOLFSON

I squinted too at the Yema superman 63 but I really think that for a watch of this price the movement is not terrible (Selitta) and the finish seems shabby with in addition unpleasant after sale service experience! So to please myself I turned on  to an Islander # 53.I gess I get it for Noël (en France!) Marc is an enthusiast who never lets out a shame watch. I already have an Islander SKX013, upgraded version of the stock SKX 13, bought sot price  on Ebay UK.  The Great look of the 013 , Flat Saphyre , pierced lug,… Read more »

MARK WOLFSON
MARK WOLFSON
3 years ago
Reply to  Olivier

Marc is a real enthusiast, would like to see close up one of his watches. Are you satisfied with the finish? Also, what do you think of the new Seiko SPD153J1?

Olivier
Olivier
3 years ago
Reply to  MARK WOLFSON

First of all I would like to apologize for my rusty English and Google help!   As for the finish of my upgraded SKX013 which comes from Marc I find it very good: perfect polishing, including between the lugs, bezel well aligned with the chapter, day / date well aligned with the Islander dial window and the sapphire crystal is perfectly centered on the ceramic bezel insert; everything is beautiful ! and it lasts + 7s / day!   Well, the inscriptions on the back of the case could be a little deeper, but we’re never happy, right! I will soon… Read more »

Olivier
Olivier
3 years ago
Reply to  Olivier

Just another thing : the rotation of the bezel is generally quite hard on Seiko

MARK WOLFSON
MARK WOLFSON
3 years ago
Reply to  Olivier

Thank you!

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Seiko Caliber 6R35A Watch Movement | Caliber Corner
3 years ago

[…] 6R35A (6R35) […]

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Presentación SEIKO Alpinist SPB199J1 – SaFonaGastroCrono
3 years ago

[…] crema y la SPB121 verde oscuro. Estas referencias se presentaron con un calibre mejorado, el 6R35 automático con una reserva de marcha de 70 horas (frente a las 50 horas de la generación […]

Peter Laurence-couzens
Peter Laurence-couzens
3 years ago

I’ve had a spb155j1 for around a month now, and the accuracy seems to be plus 1.45 seconds a day. I set it to my iPhone clock when I got it and have worn it every day since, but have not adjusted the time. Really pleased with the timekeeping. I do have a question though.
Does anyone know for certain if the 6r35a has a quick change date, or not?
Currently the date starts to change around 11pm. Any certain information would be gratefully received.
Thanks 🙂

MRQ56
MRQ56
3 years ago

I’m thinking you mean quickset date? This usually means the date can be quickly set with the crown in a date setting position. Older watches can’t be set so quickly and you have to go all the way around with the hands. The 6R35a is quickset. I think it’s normal if the date starts to change around 11. Someone else can comment, but most of my watches do the date change between 11pm and 1am. I think it varies and doesn’t mean anything is wrong.

Peter Laurence-couzens
Peter Laurence-couzens
3 years ago
Reply to  MRQ56

Thank you for your reply. No, I meant quick change, not quick set. Yes mine seems to take some time to change. All my other watches change over quickly at midnight, (or very near). If as you say the 6r35 takes a couple of hours then it would seem that my movement is behaving normally.
Thanks again for your reply.

MRQ56
MRQ56
3 years ago

Well now I need to check mine to make sure I am not giving you the wrong information. I thought mostly watches like Rolex were really fast date changers. I will check my Seiko tonight at midnight!

Peter Laurence-couzens
Peter Laurence-couzens
3 years ago
Reply to  MRQ56

I can only speak for my meagre collection, namely a mondaine (day/date) clicks over at midnight, seiko solar chronograph clicks over at midnight, rado captain cook clicks over at midnight, rotary quartz clicks over at midnight, citizen quartz chronograph clicks over at midnight, and a guess quartz dress watch clicks over at midnight. Others don’t have dates. So, the only one that changes over a period of a couple of hours is my new seiko “baby” alpinist……….

Random Randy
Random Randy
3 years ago

I am following this caliber comments and saw your post. Are the watches you listed all quartz watches? Quartz tends to switch the date over quickly and mechanical/automatics tend to take some time for the switchover to occur.

Peter Laurence-couzens
Peter Laurence-couzens
3 years ago
Reply to  Random Randy

Hello, the solar watch is quartz, the other watches described as quartz are indeed quartz, and the watches without the quartz in the description are , well, not quartz. There are many mechanical watches with date functions that click over at midnight, and indeed mine do, but as I’ve only had the “baby” alpinist for a short while I thought I’d come here to seek some definitive answer from someone(s) in the know.
Thanks.

Ian Watson
Ian Watson
2 years ago

The reason the day changes over seemingly slower is usually it jumps not one but two depending on which language you have it set on hence why the day on day date Seiko’s the day starts a bit earlier than the date and can take up to a few hours to fully settle on the new day. It is all a bit confusing as my brand new 7S26C has the slower day and date change but my 7xxx and 63xx auto’s seem to have fast moving date changing and the push crown in for instant day change on the 7xxxs.… Read more »

Simon
Simon
3 years ago

Ah. No it varies but on that movement as MRQ56 says it can take from 11pm to 2pm to fully change.

One tip with this movement. NEVER quick set the date when the hands are in the second half of the day. In other words. Move the hands manually until the date changes. Then move the hands to 6:30 am. Only then should you quick set the date. Not when the next pass of the 1200 will allow the movement to change the date.

Telmo
Telmo
5 months ago

Mine starts at 11pm till 00:30am tu date changing. Its normal
BTW I have also sent my SPB143 to Seiko’s service as since three months that Im owning it (brand new) wearing it on a daily basis, it looses constantly between -20 to -30 per day. No way for an over 1K watch. Its a beautiful watch but this caliber is not reliable at all.
But I knew it could happen so I can live with it. I bought this watch for its look, history, heritage… not to be a COSC.

Simon
Simon
3 years ago

Yes it does.

Peter Laurence-Couzens
Peter Laurence-Couzens
3 years ago

Some clarification. I’ve received an email from Seiko UK service centre regarding my 2 questions, and have been informed that the gradual date change, and the hand winding mode still being in operation when screwing the crown back down are normal functions of this movement. That’s good enough for me. I’m still amazed at the accuracy I’m getting with this movement. Very happy 🙂

William
William
3 years ago

je possede un SBDC055 alimenté par un 6R15 et j’ai chronométré la réserve de marche j’ai obtenu 62h20 la précision aussi est bien meilleure que celle annoncée

Simon
Simon
3 years ago

Having read all the comments and responded to a few I will post this in reference to the 6R35 and 6R35A: 1) the mainspring is NOT silicon. It’s metal. If you put your phone near a magnetic source sick as a mobile it will cause it to run fast. You need to demagnetise it. The kit to do this is £6 on eBay. 2) this movement is sensitive to how it is positioned when not being worn. laying it on its back, sides or face down will effect it’s accuracy – each position differently. Try not taking it off for… Read more »

Simon
Simon
3 years ago
Reply to  Simon

Ps. Excuse typos. The thing posted before I could correct them.

Eric O.
Eric O.
3 years ago
Reply to  Simon

Well said, all of it.

Jacklab
Jacklab
3 years ago

I have read some comments where we talk about the magnetism and magnetization of the balance wheel … But none of you have noticed that in the photo at the bottom of the caseback, probably of the new Seiko Alpinist SPB117, a symbol in the shape of a horseshoe is represented , which is famously used as a symbol of magnetism. Do you know that this symbol indicates protection from the magnetisms that surround us and that pride is protected from the magnetisms? If you read well the peculiarities of the movement, always in the specifications listed above, you can… Read more »

Hi
Hi
3 years ago

My spb143j1 is getting +1 a day, Out of the box i was getting +15 but movement settled down over few weeks. Impressive since rolex promises same accuracy right? since this is my first ever seiko watch im Satisfied.

Julián
Julián
3 years ago

Any plastic parts?

Nick Kent
Nick Kent
3 years ago

Very accurate when worn daily, however if left unworn over a weekend looses accuracy by some margin , 30 secs plus, it’s a daily wearer movement

Hi
Hi
3 years ago
Reply to  Nick Kent

My spb143j1 gives 1+ wherethere on wrist or in drawer as long as its winded. Almost 3 days it can keep time.

trackback
Seiko SPB147: Who Needs the Black Bay 58? - FIFTH WRIST
3 years ago

[…] the 6R35 movement, you’re getting 70hrs PR, I don’t have a timegrapher however mine seems to be keeping pretty […]

Martin
Martin
2 years ago

since i wore my spb117 im having +1 spd. im quite contented on the performance on this Explorer alternative

Budi hartono
Budi hartono
2 years ago

I have seiko presage sharp green, spb 169, 6r35, minus 22 sec / day. What is normal?

Hans
Hans
2 years ago

6R35 also used in SARX081 Japan Limitied Edition

trackback
SEIKO Sumo: El Olvidado - SaFonaGastroCrono
2 years ago

[…] de tamaño más reducido. El movimiento también sufrió cambios, ya que se le montó el novedoso calibre 6R35, derivado del 6R15, pero con 70 horas de reserva de marcha. Un movimiento destinado a competir con […]

John Hayes
John Hayes
2 years ago

After some 3.5 decades wearing Swiss ETA & Sellita my last being an Oris BC3 worn daily for a decade. I decided to flip it (ebay) AU$400 to part fund a new SPB143j 2020 model 6R35~70hr, as Seiko seem to have lifted their quality to now match the basic Swiss beaters I thought okay why not . The 70hr reserve was the clincher here for me but it’s not all roses if you only have a watch on your wrist about 5~7 hrs a day. You may expect some fast / slow lag with the 6R35 if you don’t crank… Read more »

John Hayes
John Hayes
2 years ago
Reply to  calibercorner

FYI, The Seiko SPB143j aka, (63mas) is a great little watch 40.5mm, I’m into quick view watches meaning not too much to work out, time/date or day~date as with my Ball Red Label Chronometer. The Seiko bezel is 120 clicks all stainless with matt finished stark coin edge steel insert, nothing fancy here. It looks all Titanium due to the “Diashield” coating which actually does stop minor scuffs. The Trademark rattler bracelets of the past have been improved on but Swiss mid range bracelets like the$US1400, Mido Ocean Star tribute edition still only just have the edge on overall bracelet… Read more »

Arnold Barbasan
Arnold Barbasan
2 years ago

How will I know if my movement is overwind? Does it stop or resist when I wind it? I bought my new seiko with this movement for the first time I wind it I think 60 times. Do you think my watch will have an issue? Your response is much appreciated. Thanks.

Arnold Barbasan
Arnold Barbasan
2 years ago
Reply to  calibercorner

Wow! Thanks! My watch is fine… because when I tried once winding it, just one turn I heard clicking sounds. Is that okay? Will I never wind it? Then I experience the watches +1-2 seconds a day deviation. Thank you so much.

Jani Hellberg
Jani Hellberg
2 years ago

Will 6r15 hands fit 6r35 movement?

John Hayes
John Hayes
2 years ago

Hi, just following up on 6R35 lag~gain over a month wearing it 6~8 hrs per day. Yes, you can put it down on Friday late and put it back on your wrist Monday morning however it may lag the week following. The trick is to crank it about 30 revs (thumb/index = a 3/4 turn so that’s around 25 full revs on the monthly date change (5) and minute (?) or seconds if your that particular on hacking it. I don’t sweat these things too much for an Automatic watch is after all the sum of its parts. Seiko only… Read more »

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Presentación SEIKO Sumo SPB101J1 - SaFonaGastroCrono
2 years ago

[…] ahora al movimiento que anima este reloj, tratándose del novedoso SEIKO 6R35 en sustitución del conocido 6R15, un calibre que fue lanzado en 2019 junto con las nuevas […]

Alex
Alex
2 years ago

It’s in the SPB213J1

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Seiko Alpinist SPB197J1 – Beans & Bezels
2 years ago

[…] watch uses a Seiko 6R35 movement, which is one tier above their entry level movements. They’re not the nicest […]

John Hayes
John Hayes
2 years ago

Hi, I have an SPB143j does anyone know what the 6R35~ 00P0, the 00P0 means. It’s an August 2020 made one. It always has runs about +8 seconds a day, no quarms at all. Always a smile with a Seiko on your dial. :). Cheers John.

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Presentación SEIKO SPB237J1 Edición “Seichu” - SaFonaGastroCrono
2 years ago

[…] reloj equipa el calibre 6R35, un movimiento de reciente lanzamiento pero que es una evolución del 6R15 que ya montaba SEIKO en […]

Axelle Michelle Wahl
Axelle Michelle Wahl
2 years ago

Positional variance is in now way better than 4R35/6 or MOST NH35 movements.
In various positions it is >10 s/d and therefore equally tricky to adjust as any other NH35 or 4R35.
Quite a steep price to pay extra for some longer running time… ‍♂️

Axelle Michelle Wahl
Axelle Michelle Wahl
2 years ago

It should say “in *no* way better”

Axelle Michelle Wahl
Axelle Michelle Wahl
2 years ago

Got this 6R35 in my green Willard SPB153J1 – and I’m not all that ‘over the moon’ with THAT movement. Reason being that it has a worse positional variance of ~10 s/d than some of my NH35 and 4R36 movements managing ~ 6 s/d
Am I really expecting too much for a US $ 1300.00 watch. Really?

James
James
1 year ago

Yes you are. All you get for the same amount of money for any European automatic watch is a Sellita SW200. Some Swatch owed brands you might get a lower beat rate higher power reserve version of an ETA 2824. The Seikos and the Swiss movements have their good and bad points. The Seikos are more robust and true in-house. Both are pure luck in getting good or not so good accuracy. Spend a bit more to get guaranteed accuracy or go quartz.

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Sumo SPB247J1: 30º Aniversario De SEIKO Tailandia - SaFonaGastroCrono
2 years ago

[…] reloj equipa el calibre SEIKO 6R35, la versión actualizada del 6R15, el calibre de gama media por excelencia de SEIKO hasta el 2019. […]

True Mork
True Mork
2 years ago

I have the 6R35A movement in a Seiko Baby Alpinist SPB155J1, purchased for around 550 eur 6 months ago. Although it looks nice I am not satisfied with the caliber. This probably arises from the fact that I prefer quartz watches and bought this automatic watch to have one piece that is independent of a battery or a solar power reserve. The caliber gains 25-30 seconds per day which is unacceptable. Maybe because I do not wear it for 10 hours a day every day as required but more like a couple of days per week. Being used to quartz… Read more »

Tom
Tom
2 years ago

Hi everyone, here is my report about the accuracy of this caliber on the SPB187. When worn daily from when I wake up to when I go to bed, it’s very good, the watch gains just about 2/3 secs per day. However, if you don’t wear the watch, as it loses charge, the accuracy goes well below specs, losing even 30/40 secs per day. While this is consistent with Seiko’s specifications, that say that the watch should be worn or manually charged every day to maintain accuracy, it is clear that, at these conditions, having 70 hours of power reserve… Read more »

Zapato R
Zapato R
2 years ago

I’m looking for 6R35A. Any recommendation is appreciated.

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Reseña SEIKO SPB147 - SaFonaGastroCrono
2 years ago

[…] movimiento se ha actualizado al 6R35, que ofrece una reserva de marcha de 70 horas. El fondo de caja atornillado junto a su corona […]

John McGing
John McGing
2 years ago

Got a Prospex Alpinist 3 weeks ago and the accuracy has been excellent-consistently -3secs/day for about 9 days and then +3secs/day for the next few days.Since then it has fluctuated day by day but still only by 3 secs.Still reading GMT-5 secs;very pleased for an inexpensive watch…..

Gordon Lefort
Gordon Lefort
2 years ago

when I received my SR35 in a new captain willard it was running 10 seconds slow. i had my Swiss Watchmaker adjust the timing and it’s now +-0.
Great movement!

dingdong
dingdong
1 year ago

What is the diameter of Seiko Sumo 103 dial?

Vaggelis
Vaggelis
1 year ago
Reply to  dingdong

32mm

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