Seiko NH35 vs NH36 Movement: Which one to choose?
NH35 vs NH36: Which Seiko movement to choose?
The Seiko NH35 movement and the Seiko NH36 are the engines of most of our Seiko Mods. Very similar, they are distinguished by one key difference.
NH35 vs NH36 Comparison Table
| Feature | NH35A | NH36A |
|---|---|---|
| Frequency | 21,600 bph | 21,600 bph |
| Power Reserve | 41 hours | 41 hours |
| Jewels | 24 | 24 |
| Date | Yes | Yes |
| Day of the Week | No | Yes |
| Accuracy | -10/+30 sec/day | -10/+30 sec/day |
The only real difference: the day of the week
The NH36 adds the day of the week display. This is its only functional difference from the NH35. If your dial has a "DAY/DATE" window, it uses an NH36.
Reliability and precision
Produced by SII Manufacturing (a Seiko subsidiary), these movements have powered millions of watches since the 2000s. Recommended maintenance only every 5-7 years.
Which movement in our Seiko Mods?
- NH35: Submariner, GMT, Nautilus, Royal Oak, Daytona
- NH36: Daydate, Datejust with day display
NH35 / NH36 FAQ
Can the watch be wound manually?
Yes, both movements are manual and automatic winding. With normal use, daily wear is sufficient.
What is the lifespan?
With maintenance every 5-7 years, an NH35/NH36 can last 20 to 30 years.