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Seiko SII Caliber NH35

Seiko (SII) Caliber NH35A

Seiko SII Caliber NH35

ManufacturerSeiko
Caliber NumberNH35A (aka NH35)
Movement TypeAutomatic
Jewels24
Vibrations Per Hour
21,600 bph
Lift Angle53 degrees
Shock SystemDiashock
Power Reserve
41 hours
Winding Direction
Bi-directional (Magic Lever)
Hacking?Yes
Hand-Windable?Yes
Diameter27.40mm (outside) / 29.36mm (casing)
Height5.32mm
FunctionsHours, minutes, central seconds, date calendar
Country of ManufactureJapan/Malaysia
Known Brands
Seiko, Invicta, Vostok, Lum-Tec, Spinnaker, Minus-8 Layer, Advisor AstroHelm, Advisor Ascent (add more in the comments below)

The Seiko/TMI/SII caliber NH35A is a hand-windable, hacking upgrade from the Seiko caliber NH25A (read more here). The earliest documentation on this movement that we were able to find was issued on 2/14/2011, this also corresponds with the 2011-2012 time frame that the first NH35A powered watches started hitting the market.

The NH35A is currently one of the world’s most popular automatic movements and is widely available in many affordable/microbrand watches.

Time Module aka Seiko Instruments labels the NH calibers as part of the “Basic” Mechanical Series. They also have NE calibers that are labeled as “Premium” Mechanical Series.

NH35A Also Known As…

It’s also important to note that the Seiko NH35A movement is basically an unbranded version of the Seiko caliber 4R35. for example, the NH36 is an unbranded version of the 4R36 (day + date) found in the Next Generation Orange Monster. More information here.

Accuracy:

In the technical documentation, Time Module claims that the NH35A accuracy range is within -20~+40 seconds per day under normal conditions. They recorded these accuracy measurements without the date complication being active. This shouldn’t have any noticeable bearing on the accuracy, but it’s interesting nonetheless.

Note: When you attempt to get a measurement of your watch’s accuracy, it’s important to make sure your watch is fully wound or the lack of power reserve may skew the test results. TMI states that measurements should be done within 10-60 minutes after the movement is fully wound up.

Winding the Mainspring:

So what does fully wound up mean? The NH35A should be fully wound after about 55 manual turns of the crown.

This movement is also equipped with the Seiko Magic Lever, so shaking the watch side to side should get it going almost immediately.

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

Rotor Variations

While many watch brands that use the NH35A will opt for a custom rotor (oscillating weight), as of the official tech sheets from March 2017, two stock rotors are available depending on the country of origin: Japan or Malaysia.

Sii Caliber Nh35a Rotor Japan Malaysia

Replacement Price

At the time of this post, replacement prices for the caliber NH35A were found online for around $46.00 USD. Buy it here


Examples of NH35A Powered Watches

Seiko NH35A movement in a Minus-8 Layer watch

NH35A in a Vostok Jurgis Kairys – notice that this one doesn’t say Japan or Malaysia on the top.

NH35A in a BOLDR Odyssey bronze meteorite dial diver found here.

Sii Nh35a Boldr Micro Brand Dive Watch

Video Action:

Here is a quick film of an NH35A movement found in a BOLDR Odyssey bronze microbrand dive watch.


Additional Resources:

What do you think about Seiko (SII) Caliber NH35A? Keep comments respectful and follow our community guidelines.

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Phil Savory
Phil Savory
• 5 years ago

I’ve an INVICTA divers style watch with this movement…bought it about 6 months ago…honestly I can’t complain…gains about a minute every 11 days never ever take the watch off..built like a russian tank £106:00 plus p+p…happy days….very smooth rotor…very quiet..10/10…..Phil.

john molyneux
john molyneux
• 4 years ago

Thanks for your review phil,i have a few wstches with the nh35a in and to be honest,i’ve not wore them yet but if losng or gaining 1 minute every ten days or so is right then that is great for an automatic.i’d read that this particular movement was very good so if your review is right then im happy.
John

Brandons
Brandons
• 2 years ago

I agree that this NH35A movement is truly impressive for the cost and its accuracy. I have an INVICTA which cost about $100 but keeps on time with the NIST Atomic clock on a winder or when worn within 10 seconds per day, and I have checked it to a closer tolerance than that recently. For an inexpensive automatic movement it has performed far better than an Orient M-Force which cost 3 times as much.

John Wood
John Wood
• 2 years ago

I have a 122 dollar seiko 5 sports watch w/4R36A movement–when worn regularly it is -3 seconds a day.

Bert Kanne
Bert Kanne
• 2 years ago

I have quite a few watches with NH35a. One in particular in an Invicta Prodiver 17042 is COSC accurate and it has never been opened or calibrated. How is this possible?

Larry
Larry
• 1 year ago

I don’t know but my Breitling and Omega NEVER kept time as well. Pro Diver running +0.6 Spd. I got lucky.

Larry
Larry
• 1 year ago

After 2 months it now lost 5 minutes. Still beats my Breitling with an ETA 2428!

Jorge Robles
Jorge Robles
• 1 year ago

You were lucky. What happens is that companies that produce their own hairsprings and assemble their own balance wheels and bridges, have some tolerances where the hairspring is slightly longer or slightly shorter, or just the exact length. And then, the same happens when the poise is done, it has slight variations from the center, and the collete positioning too. And there is also the size and shape and balancing of the balance wheel too.… Read more »

David Reimer
David Reimer
• 4 months ago

LUCK

MARK WOLFSON
MARK WOLFSON
• 1 minute ago

Hi Bert, hope your day is going well. I would appreciate your assistance. As you are very familiar with this movement, I have a Pro Diver 8926OB. When I got it, within a 24 hour period (including rest), I was getting -1.6spd. Now, on wrist I am getting +.5spd but it speeds up significantly over night in any resting position (+3spd). So I am getting net, +4spd. Could you please tell me what resting position… Read more »

John T
John T
• 1 year ago

I have a PolAm shark mesh diver which has the nh35 in it – I adjust mine about a minutes every 10 to 14 days, so I think this movement works well if worn daily like I do

Steve
Steve
• 5 years ago

I have a Momentum M30 with the NH35A movement its been back to Momentum twice and it still loses time. About a minute every three days. I have a Deep Blue with the Miyota 9015 movement and it keeps between + or – 5 to 10 seconds a day. I have the Seiko Monster II with the 4r36 and it its within a minute a week.

Berton Kanne
Berton Kanne
• 3 years ago

My Orient Mako USA, though not hacking with their in house movement, is far more accurate than either of my Invicta watches that have the NH35a. I am sure my are NH35a’s are not made in Japan

Brian
Brian
• 4 years ago

MWC Kampfschwimmer Autos also use this movement. Be advised that when MWC needs to top of an order (run out of NH35a’s) they will substitute Sellita SW 200’s. The chances of getting a Sellita is small though.

Edward D.
Edward D.
• 4 years ago

I bought an Invicta Pro Diver with this movement. It looses 3 seconds each day, pretty precise.

Heff
Heff
• 4 years ago

Same here. What a workhorse. Just wish it were decorated better.

CM
CM
• 1 year ago

Same. -3 spd. From the box. No special treatment. Wear most of all of the time.

Charlie
Charlie
• 4 years ago

I recently got an Invicta Pro diver 8926OB with this movement, and out of the box, started off +15 seconds a day! By the 3rd day was up to +26 seconds in 24hrs. I exchanged it, and out of the box, it started off + 3.5 seconds a day, and after 1 week, it running at +2 seconds a day! You just have to be lucky!

Jeremy
Jeremy
• 2 years ago

There is a very good chance that the first Invicta watch you bought might have been magnetized. It’s always good to purchase a demagnetizer machine off of eBay, they’re like 10 bucks, the little blue machine with the red button they, work great and I use them on all my automatic watches. Unless you own a automatic watch that has a high Gauss rating in the movement.

Wing
Wing
• 2 years ago

This is a very helpful tip! Thanks Jeremy.
I am lucky that my DELTAt Umi is only losing 1-2 seconds in 24 hours. But I will look into a demagnetizer just in case.

Cary
Cary
• 21 days ago

A magnetized watch is going to run worse than +26 seconds a day.

gybognarjr
gybognarjr
• 4 years ago

I have an Invicta Grand Diver, it is as big and heavy as a wall clock and thick as a Hero sandwich. The NH35A caliber is surprisingly good, looses 3-4 seconds in 24 hours. The watch is a good value at $104.00 and if used in diving, one needs no extra weights to go down.

Seiko Saat
Seiko Saat
• 4 years ago

Seiko NH35A really good mechanism.

rebecca
rebecca
• 4 years ago

Jiusko watches also feature this movement in a variety of models at affordable cost

graysclassics
graysclassics
• 4 years ago

Bought an Invicata Diver with this NH35A movement. Gained 5 MINUTES per DAY…. had it regulated, ok for a couple of days, then gained 15 MINUTES a day…. must have been unlucky!

julio
julio
• 4 years ago

These movements are regulated and built by machines so is better to leave them alone because having them regulated by a human being they will never be the same…

Ralph
Ralph
• 4 years ago

How is that a logical comment in any way? If turning a screw put there for the purpose of regulating a watch one way makes the watch run faster or the other way to run slower how does it matter if a machine or a human turns it? It obviously went out of spec. so the screw needs to be turned to compensate….. And the guy said it worked for a bit so that negates… Read more »

Tim G
Tim G
• 3 years ago

Magnetised maybe?

Manny F.
Manny F.
• 3 years ago

It’s magnetized! That’s what happened to me. Take it to your watchmaker and have him demagnatize it back to normal. Don’t try adjusting the speed until you do this FIRST.

Curious
Curious
• 4 years ago

I have a MWC kampfschwimmer diver with a 24 jewels and 41h of power reserve. I wondered what the chances are for its movement to be a NH35a. I have this movement in my Seiko and I am very pleased with it. Very accurate and affordable. It is not less accurate than the movement in my Omega, which is far from affordable. Fingers crossed my new MWC diver has an NH35a.

Jay
Jay
• 4 years ago

This is my daily wear mechanism. Can this movement/caliber be overwound? Can the screwdown threads wear out easily? I regularly use a counter-clockwise winder (every evening) and/or have the habit of unscrewing the crown and making a dozen or more clockwise turns at the normal position. I realize that the watch can hold 3+ days of “charge” at a time, but I’d rather keep it spot on. Any concerns/cautions with my practices?

Mr. Brooks
Mr. Brooks
• 4 years ago

The NH35A movement cannot be overwound there is a mechanism inside that prevents this. You’ll be fine.

Ralph
Ralph
• 4 years ago

if it’s your daily wear watch it should already be fully wound if you are even remotely active during the day. You do not need to manually wind the watch at all. Most watches, if the wearer is semi active, can wind fully in 4-8 hours.

Jeremy
Jeremy
• 2 years ago

All watches that are automatics are different on the winding process. I own some that I only have to wind 15 to 20 times, I have other watches that I have to wind 40 to 50 times, so it honestly is all about leading and figuring out the watch you own. Some watches will tell you in a manual, some don’t have a manual so you can look it up on YouTube sometimes and they… Read more »

John Ferguson
John Ferguson
• 4 years ago

We use a lot of MWC divers watches professional (marine salvage) and of the 20+ we have most of the new ones (last 2 years) are NH35A, before that some were NH35A, some Miyota and some were SW200 but they are using almost all NH35A according to Axel Schmidt who I normally deal with at MWC in Berlin. I think the NH35A seems great with good power reserve and seems to be accurate to a… Read more »

Jerry
Jerry
• 4 years ago

I have worn an invicta 0420 titanium diver with this movement for four years. Its accurate to about three minutes per month. Very nice watch and worth every penny. The crystal is still unscratched except for a near-invisible scratch on the face made when my arm swung against the sharp point of a deck screw in my garage a few years ago, and my watch face hit it a glancing blow.

Laurence
Laurence
• 4 years ago

I have a new NH35A-based watch and I have been very pleased with the accuracy after 4 weeks of daily wear. Every automatic watch I have ever owned has lost time each day. But this NH35A actually gains time every day and the great news is that the time gained has been no more than 20 seconds per week! My last watch was NH25A-based and it tended to lose about 9 to 10 seconds per… Read more »

Jeremy
Jeremy
• 2 years ago

I will say that I will never buy an Invicta watch as long as I live no matter what movement they put in it for the fact being that I purchased it from a authorized dealer in. January 26th 2018 and wore it one time to the grocery store on February 3rd 2018 for about an hour and the faux hex bolt on the rotating bezel broke and I had to send it in to… Read more »

Matt T
Matt T
• 11 months ago

I purchased an Invicta 8926OB over 4 years ago and it’s held up nicely. Still runs 3 to 5 seconds per day slow, which is outstanding. At $83, I consider it a throwaway watch when the day comes that it breaks. I’ll just order a new one.

carlos
carlos
• 4 years ago

invicta divers con nh35, fantastico calibre de seiko muy preciso +3 seg aproximadamente x dia, con los cambios de temperatura y posiciones varia ya que no es de grado cronometro, pero no es mucha la diferencia de variacion en el frio al dejarlo sobre la mesa a una temperatura de unos 10 grados celsius seran unos 4 a 6 segundos cuando mucho 10 segs. de variacion de adelanto en temperatura de frio, al ponerselo en… Read more »

C. Dilg
C. Dilg
• 4 years ago

I have about a dozen watches with the nh35a, 5 with the 282, 4 with the 200, and 2 with the 7750. There is no comparison with the 7750 but as yet I do not own a 500. I buy only automatics or mechanicals-usually auto’s. I can feel the mechanical friction produced by the nh35 and hear the rotor when working with my hands. I have as yet to break a movement but have cracked… Read more »

Brandon Blanchard
Brandon Blanchard
• 2 years ago

Hard on watches? Nah! Last I checked, shooting them from 500ft is the norm!! Lol! Sounds like fun!

Socrates
Socrates
• 2 years ago

At 500 ft, to hit a watch face, I’d say you also proved you’re a pretty good shot!

Alan
Alan
• 4 years ago

I have had 2 Invita $90 NH35A Automatic Diver Watches for over 1.5 years now and they have functioned flawlessly. Like a few of the other reviewers I gain approximately 1 minute every 11 days with both of them. That’s not much different in time off as my Hamilton 7750 X-wind. I think, for a wear every day and don’t care what happens to them kind of watch, they are one of the best buys… Read more »

dan cotton
dan cotton
• 4 years ago

I have the mwc vietnam field watch homage,and it’s great No noise,very sure winding mvmt,and accurate.For price it’s amazing,Just feels like class when wearing it.Will look for it in other watches

t-dab
t-dab
• 4 years ago

The Unimatic Modello Uno features the robust/no nonsense Seiko NH35A. Clean watch, Clean movement.

Miguel Maldonado
Miguel Maldonado
• 4 years ago

Helm Watches
Vanuatu wach

johnnyjohnny
johnnyjohnny
• 3 years ago

going thru this thread i am clicking on some watches with the NH35A that are mentioned…the vanatu is vanacoooL!

Robert Polverari
Robert Polverari
• 4 years ago

Just got an Invicta divers about 2 weeks ago with the NH35A movement. I am very pleased for 110$ (CAN) that I paid for it. It looks great and as for keeping time, I cannot complain. Must of got lucky because it is at between ± 1-3 seconds per day. Testing it using the computers internal clock. If its based on the 7S26 movement which is found in my Seiko’s diver that I bought in… Read more »

Charles S
Charles S
• 8 days ago

In 1991 I bought a brand new Rolex Oyster Perpetual Datejust. It is a beautiful piece of jewelry. Time keeping, not so much. It never kept very good time and friends who also own them told me that theirs are similar. I don’t remember exactly but I think it was about 5 minutes per month for a Superlative Chronometer Officially Certified! I wasn’t doing anything that needed real precision like diving or flying a plane,… Read more »

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Charles S
Charles S
• 8 days ago

I bought the Invicta from Costco because it was a limited time offer and it specified the NH35a caliber. I looked on Amazon and was surprised that most of them were quartz movements, either Swiss or Japanese. I went to the Invicta Store also. They had a lot of automatics, but none of the caliber movements were specified. Thanks to everyone on this thread for their honest opinion on this caliber. Now I suppose I… Read more »

Joejo
Joejo
• 7 days ago

Any pics of the Invicta? I can’t seem to find what I want with a NH35A in it.

Mark Diaz
Mark Diaz
• 4 years ago

I have this movement in my Invicta 8928A. It runs about a minute fast every three days. Not exactly a precision movement but it is “a workhorse” It has never given me problems except for the unacceptable inaccuracy in time keeping.

Roberto Polverari
Roberto Polverari
• 4 years ago

Have you tried to adjust the timing yourself? Not very difficult just need to be very patient. When you move the lever to either + or -, use a wooden toothpick clipped at the end. I strongly suggest that you use a magnifying eye piece do you can see the diplacemnt of the lever properly. I adjusted my Seiko 7S36 movement like this. Was running 20 spd too fast when I received it. Got it… Read more »

A. David
A. David
• 3 years ago

I gasped when I got to the end of your post! I no longer have that age around me but your experience Proves my purchase was well invested. Thanks

johnnyjohnny
johnnyjohnny
• 3 years ago

a long time ago i too would adjust my seiko diver 7s36 movement with the eyeglass/toothpick method and got it more accurate than my new rolex datejust chronometer at the time. i was again deciding to get another seiko diver classic but couldn’t do it for $250 (japan model) when i got my invicta 9110 diver this week with the nh35 movement for $92. that the nh35 has winding is a huge difference. i know… Read more »

johnnyjohnny
johnnyjohnny
• 3 years ago

have done this with classic seiko divers before. after 2 tries with the toothpick you usually have a watch running much more accurate than a new rolex. how do i know? i’ve had several new dealer rolexes that couldn’t compare to an adjusted basic seiko movement. a datejust and a submariner…about 10 years ago. both chronometers. if you don’t have $5000 these days, you can’t go wrong with any of these watches that have the… Read more »

Cary
Cary
• 1 month ago

Rolex Datejust is not a chronometer.

Wostepper
Wostepper
• 1 month ago

Rolex Datejust has the 3135. It is definitely a Chronometer. All Rolex watches today are Chronometers.

Paula
Paula
• 4 years ago

What does the A mean? Is there a difference between NH35 and NH35A? Is there a NH35B C or D?
Great site!

M Heisey
M Heisey
• 3 years ago

I assumed the “A” was and indicator for “automatic”

Stephen Barry
Stephen Barry
• 3 years ago

Is there an M for manual wind?

A. David Griffin
A. David Griffin
• 3 years ago

I have learned so much in the last 15 mins reading these posts. I had no idea such knowledge was available, let alone necessary. Could someone possibly inform me to what “hacking” refers to? I have my ideas, but I couldn’t possibly think that people actually ‘hack’ into a nice watch.

Michael Dandurand
Michael Dandurand
• 2 months ago

Means the second hand stops when you pull the crown to 2nd click.

Coleman
Coleman
• 2 months ago

Why do so many guys even care about hacking or not? I’ve read comments of guys going ape shit because a watch being reviewed doesn’t have hacking. For me I couldn’t care less. I never look at the seconds hand of my watches.

Leroy Nicewatch
Leroy Nicewatch
• 3 years ago

Holy shit thank you for this info but wtf is the A for? As in, NH35(A)?

Matt
Matt
• 3 years ago

Leroy, it stands for Anus.

Brandon Blanchard
Brandon Blanchard
• 2 years ago

Lmao!! ANUS!! NH35ANUS

A. David
A. David
• 3 years ago

Just had to announce to those who’d truly appreciate the news: After reading a few threads on this and another site I felt comfortable enough to make my first Invicta Pro Grand Diver 90201 purchase earlier this afternoon. I’ve never purchased a watch of this quality. Thank you for providing such insight and depth – while making it comfortable enough to keep up – a little. It’s obvious I’ve stumbled onto something like enjoying a… Read more »

t-dab
t-dab
• 3 years ago

Good choice A. David, congrats!

Larry
Larry
• 1 year ago

Mine lost 0.56 Spd the first month and now runs dead even with my Citizen Navihawk AT. Shouldn’t be possible but I got very lucky

Larry
Larry
• 1 year ago

Losing 5 minutes every 30 days now. Not too shabby for $70.00

Rik
Rik
• 3 years ago

Seiko nh35a
Great movement,,
I saw even Chinese watches use this seiko movement
Seiko selling policy probably…but iT is a pity

Ross W Williams
Ross W Williams
• 3 years ago

In the article it asked to add companies that use this movement. Android-USA now Aragon watches has been and continues to us the NH35a. They also use its bigger and better brothers in some of their watches. I would look into this company or used or new stock Androids. I have three of them and love them all. The Android Endeavor, Rotator Limited Edition (83/150) in Rose Gold and the regular Silverjet. All of those… Read more »

Bert
Bert
• 3 years ago

I have a Swiss Military Conger. Xlnt in every way except it does not fit me. It is extrememy accurate and its Swiss quartz movement. I have an Android Silverjet AD780 as well. It has a Miyota quartz movement and seems to be bullet proof. I would like to sell the Conger. Its new in box. Contact me if you or someone you know is looking for one and wants to save big.

Mac
Mac
• 3 years ago

Wow!, your Conger Nero Auto by CX Swiss Military is not a watch; …it’s an amphibian timing tank! Wow!!!
Congrats!
This is a great forum; I’m learning about concrete things and watches I’d never heard before. Great site!

Ross and or ScrapHMS and or FerroChrome99 on other forums.
Ross and or ScrapHMS and or FerroChrome99 on other forums.
• 3 years ago

To Mac and Bert, thanks for your comments, Bert, I’ll ask around, and Mac I’m posting some pics with this post. I’ve been really busy stalking Land Rover forums since I took over my mom’s old one after I sold 2011 car to save up and pay cash for my new/used F250 big boy toy again. So unfortunately the Rover is taking the expendable income for watch collecting in the 85-150 buck range. I would… Read more »

Ross and or ScrapHMS and or FerroChrome99 on other forums.
Ross and or ScrapHMS and or FerroChrome99 on other forums.
• 3 years ago

Oh on me. I’m 6’8″ 330 lbs. With a hand span of over 12″ and at least 9.75″ wrist size for watches to feel comfortable. So my ridiculous huge Conger Nero Auto looks normal sized. Similar to a 16 or 24oz aluminum can looks normal in my hand like a 12oz coke can in everyone elses. Too many watches are dainty and womanly with small face sizes.

Tim Mills
Tim Mills
• 3 years ago

I have recently acquired one of these Lew & Huey Orthos divers with the NH35.
Please take a look at this video from the guy behind the brand and tell me what you think of this instruction for lateral pressure when returning the crown? I’m wondering if it’s a case design problem? Mine is very tricky! thanks.

A. David
A. David
• 3 years ago

I’ve had the trickiest time posting a photo as promised. Please advise.

Walter Licker
Walter Licker
• 3 years ago

I have the Invicta 8926OB with NH35A movement. It was running +20 s/d, so as I’m not a diver I decide to improve it’s accuracy. I used a toothpick with jewellers eye glass. It then ran just -2 s/d, so I adjusted it again and now it runs +2 s/d. I leave it at rest at night either crown down or crown up and by the morning it’s back to status quo. Now I am… Read more »

Joe
Joe
• 2 years ago

It took me 2 weeks of trial/error to adjust my Invicta N35A to be +3 sec/day. I sync my watch every morning.

Kelvin
Kelvin
• 3 years ago

By the way, does this movement have an indirect second hand drive like the miyota 8215 or the direct second hand drive like the ETA 2824-2. This makes a difference because if you swing your hand rigorously while doing a sprint with the miyota 8215 or the 7s26 powered watch, the second hand stops momentarily, not by much, about 0.2 – 0.5 secs but when it stops by 0.5 secs everytime you swing your arm… Read more »

WC Licker
WC Licker
• 3 years ago

I can’t do anything rigorously at my age I haven’t got the strength to pull a cat off a window sill. Just to you updated, I have been to Spain for ten days. The average temperature was 35 degC and my watch kept perfect time every day. As soon as I returned to the UK, after the first day 22 degC, it was +2sec/day. Weird, I guess I’d better go live in Spain to keep… Read more »

D Bolton
D Bolton
• 3 years ago

bought an invicta 8926ob with this movement four months ago – out of the box it was running just over plus one second a day and this has continued – have purposely left it alone completely not even adjusting the date and in exactly 121 days it has gained 129 seconds. crown screws down easily and it is completely waterproof when snorkling in about 15 feet of water – not been diving as yet.

A. David
A. David
• 3 years ago

Good day, I’ve noticed over the past weeks so my Invicta Grand Pro Diver has gained 2 mins. I,m concerned because it became such an apparent issue so quickly. Please give me some reference, perhaps from previous threads. I will search as well. Also, I still cannot figure out how,to post pics of my watch.

johnnyjohnny
johnnyjohnny
• 3 years ago

might help to know if this is an old or new watch…what conditions it’s used in. i have a number of nh35 invictas and they start out gaining about a minute a week out of the box but generally settle down a bit. by the way between 8 and 9 seconds gain a day without being adjusted is not a major departure from auto movement performance unless it is a chronometer.

Lars Midthun Portch
Lars Midthun Portch
• 3 years ago

I have a Seiko SRP659J and a SRP777 (K) “Turtle” with this movement,the NH35A. Both run crazy accurate. However the SRP659 is a J,a domestic and it ran +2 spd out of the box. The SRP777 is a Malaysia made Seiko and it had to go in some adjusting before it became spot on. The winding on the SRP is so smooth,soo smooth…..

Marc
Marc
• 3 years ago

This is a great thread and site.. I’m expecting delivery of an invicta diver with the NH35a and was intersted in the movement quality. This thread has answered all my questions. Well done all!

Ian Masterton
Ian Masterton
• 3 years ago

The latest Gigadet Sea Ground subs have the NH35 fitted. Just for info.

Yankeexpress
Yankeexpress
• 3 years ago

In addition to the newer Gigandet, the Borealis Sea Hawk, Armida A9 run the NH35. It is basically the same movement as the 6r15 at a much lower price point, giving away only a little power reserve.

Ravi
Ravi
• 3 years ago

Hello There.

Recently I purchased an Invicta Pro diver 8927 with NH35A.. The movement is with yellow colored rotor.

The thing is its hand windable BUT non hacking!!
I pull out the crown all the way to adjust the time but the second hand keeps on ticking.

How is it possible? Is it observed in all new watches or is it a flaw considering its assembled i Malaysia?

Kelvin
Kelvin
• 3 years ago

Hi Ravi,

NH35A is definitely hacking. Unless it is broken , it could be an Citizen 8215 movement.

Ravi
Ravi
• 3 years ago

Hi Kelvin,
Thanks for reply.

The movement is definitely NH35A as per the pics.
Only thing is its not hacking.

Do I need to replace the watch?

It keeps good time though

Marc
Marc
• 3 years ago

Hey Ravi
I recently bought a Invicta Mickey Mouse dive watch with the NH35A movt and it is definitely hackable. It’s keeping good time and has only added circa 1 min in a month.

Can anyone suggest/recommend another movt, swiss or Japan that is worthy of adding to a collection.
Thanks.

Marc
Marc
• 3 years ago

Edit.. *16 secs in a month

mark wolfson
mark wolfson
• 7 months ago

I have the same problem, 8926OB. It does not hack and does not self wind. Sent to Invicta repair center twice under warranty. They did not fix it, cannot understand their QC (IWSC). I am sending it back a third time! I believe the crown stem is not connecting to the movement. IWSC told me that they had replaced the parts responsible for the hacking and manual winding, but even this did not work.

Berton Kanne
Berton Kanne
• 7 months ago

The only NH35A movements that I have had problems with ( I have had dozens of them) were not made in Japan. I would try to have a competent jeweler replace the movement, but only with a Japanese made piece.

Keepthetime
KeepTheTime.com
• 3 years ago

Hi Ravi, can you post pics of your movement? The older version of your watch was actually fitted with an NH25A which is non-hackable and cannot be hand-wound. You have to be careful because some sellers copy and paste the specs directly from the Invicta site and may list the NH35A even though it has the NH25A. This happens a lot with Vostok watches since the models are the same but with different guts.

Jerico
Jerico
• 3 years ago

This is true! It happened to me before when ordering from ********. http://www.watchtalkforums.info/forums/thread58911.html

Bert
Bert
• 3 years ago

I have an Invicta Pro Diver 17042, which is very similar to your watch. I’ve owned it for a about four years. It has the NH35A SII movement which hacks perfectly and is about 8 seconds a day fast. If you have your movement repaired, whatever you do, do not send it to Invicta! They cannot be trusted.

Keepthetime
KeepTheTime.com
• 3 years ago

Seiko caliber NH35A in a Haigh & Hastings Classic

Available here

johnnyjohnny
johnnyjohnny
• 3 years ago

wow…this website is the darnedest best…i love your NH25 vs. 35 comparison that answered the question of why one member’s NH did not hack. one of the best watch websites i’ve encountered…thank you guys!

johnnyjohnny
johnnyjohnny
• 3 years ago

will do!

Jonathan Ferrer
Jonathan Ferrer
• 3 years ago

Brew Watch Co. also using the NH35A movement

Winnie
Winnie
• 3 years ago

I see this is a community of experts: please HELP. I have recently broken the (mineral) glass of my https://www.invictawatch.com/watches/detail/3049-invicta-pro-diver-men-47mm-stainless-steel-gold-stainless-steel-blue-dial-nh35a-automatic . I wish to replace now the glass with sapphire (I don’t care for the extra cost, as it is a memory). Any idea if this is possible and where to go ask for the sapphire glass ? I hope some guru will read this..

Bert
Bert
• 3 years ago

If you can precisely measure the broken crystal, I would contact Otto Frei in Oakland, CA. I went there recently for a leather watch strap and clasp. They are amazing. They primarily sell to people in the watch repair business, I believe.

A. David
A. David
• 3 years ago

Sir., Unfortunately a luminous hour display became unhinged. After trying to get repairmen @ the 60 mile radius to repair it with no success – in addition to Invicta’s poor service reputation – I’m considering procurring a repair station for my Invicta Grand Pro Diver. I would appreciate any counsel (pro/con) you might share with me. The Demagnatizer worked well, but I seemed to need to use it daily as it would continue to gain… Read more »

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Seiko Caliber 7S26 Watch Movement | CaliberCorner.com
• 3 years ago

[…] the market in 1996. Seiko dive watches, such as the Orange Monster, have since been upgraded to the caliber NH35, making Seiko collectors happy because the 7S26 seen here does not hack and is not hand-windable […]