Seiko Caliber Nh35a Vs Miyota 9015

Seiko NH35A VS Miyota 9015

Seiko Caliber Nh35a Vs Miyota 9015

Seiko Caliber NH35A Miyota Caliber 9015
  Seiko NH35A SII in a Vostok Jurgis Kairys Watch Miyota caliber 9015 automatic watch movement
Year Introduced ~2011 2009
Type Automatic Automatic
Lignes 12”’ 11.5”’
Diameter 27.4mm 26mm
Height 5.32mm 3.9mm
Jewels
24 24
Vibrations Per Hour 21,600 bph 28,800 bph
Power Reserve 41+ hours 42 hours
Accuracy
-20~+40 sec/day
-10~+30 sec/day
Lift Angle
53 degrees 51 degrees
Hacking? Yes Yes
Hand-Windable? Yes Yes
Date? Yes Yes
Hand Size 1.5mm/1.0mm/0.21mm 1.52mm/1.0mm/0.17mm
Anti-Shock Protection Diashock Parashock
Country of Manufacture Japan or Malaysia Japan
  Buy Buy

Differences are in red

Seiko caliber NH35A VS Miyota caliber 9015

When comparing the NH35A and 9015, it is important to note that these are two of the most popular non-Swiss automatic movements. Both movements are made in Japan, while some NH35A movements are also made in Malaysia. Both calibers are considered to be workhorse movements and are found in many affordable microbrand/crowdfunded watches.

Beat Rate:

With all of the differences between these two calibers, the most dramatic difference is the beat rate. The Seiko NH35A beats at 21,600 bph, whereas the Miyota 9015 beats at a higher 28,800 bph.

Complications:

Both the Seiko NH35A and Miyota 9015 have a quick set date.

Crown Position Functions:

The Seiko NH35A and Miyota 9015 have similar time setting functionality.

0 (against the case): Manual Winding
1 (pulled out one click): Date setting
2 (pulled out two clicks): Time setting

Rotor Winding Direction:

The Seiko NH35A is equipped with Seiko’s own Magic Lever, so the rotor winds the mainspring in both directions (bi-directional). The Miyota 9015 rotor winds in clockwise direction only.

Interchangeability:

The NH35A and 9015 measure up with a slightly different diameter and height. These two movements are not meant to be swapped, and although an experienced watchmaker can possibly pull of an NH35A/9015 mod, it would depend on the application and would not be worth the amount of work needed.

Replacement Prices:

This may surprise most readers, but compared to the Seiko caliber NH35A, the Miyota 9015 costs more than double. The NH35A can be found in the range of $35 – 45 USD. The 9015 can be found in the range of $100 – 135 USD.


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Allie
Allie
3 years ago

I have watches with both of these movements but I never really thought about which one I like better. I just always assumed they are basically the same. I never knew about the differences in beat rate and price!

Matt
Matt
3 years ago
Reply to  Allie

Seriously! The price of a Miyota 9015 is almost the price of a Swiss made Sellita. Never knew that!

HoustonReal
HoustonReal
2 years ago
Reply to  Matt

Those are retail prices, not the wholesale prices offered to watch brands.

jeffrey w hoffman
jeffrey w hoffman
3 years ago

tend to say with the nh35 never any issues

Peter
Peter
3 years ago

Price difference is new to me. Interesting.

Ray
Ray
3 years ago

I have a few nh35 watches and they are only +/- 2 or 3 secs a day…i must be lucky. My seiko prospex with 4r36 is gaining 3 to 5 mns a day…after i paid 250 to have it repaired and was told i got a lemon with a badly coated spring. As for the 9015, its higher beat rate means more wear and tear of components and earlier costly servicing.

Robert
Robert
2 years ago

I enjoy this reading, none of my watches have the Miyota 9015 movement. It’s ETA, NH35, 6R35, Sellita or quartz.. I have notice, most micro watches have NH35. None of my have any issue. I have 4 watches with them. Thank you

Mark M
Mark M
2 years ago

I’ve worked with a 9### series Miyota, This one had an open heart front so might be a better finish. But there is no slop in the hand setting like with the 8### series or the Seiko NH35/4R36. And it looks higher quality build to my eye. Given a choice between two otherwise equal watches, I would choose the 9### despite being a Seiko guy all my life. Would pay a little more for it, too. As for durability, if beat frequency were a significant factor in watch repair, 28800 would be far less common. Watches with either movement will… Read more »

JP
JP
2 years ago

Miyota is easier to start up and finish is so much better. NH35 is better compared to the 8 Series from Miyota and are simular in price.

Raul
Raul
1 year ago

I am really surprised to know the price difference and if any one can enlighten us on why the price difference and is the Miyota really much much better to cost 3x more.

George k
George k
1 year ago
Reply to  Raul

Most of the seiko bare movements are made by a subsidiary (still owned by epson) not in Japan. The miyotas are all built in Japan. I think that’s a big difference.

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