Automatic
A reliable Japanese automatic movement featuring a date complication. The NH35 is one of the world's most trusted automatic watch movements, known for its durability, accuracy, manual winding capability, and hacking seconds. It is widely used in dive watches, sports watches, and everyday automatic timepieces.
The TMI NH35 is an automatic mechanical movement developed by TMI (Time Module Inc., part of the Seiko Group). Renowned for its reliability and ease of servicing, the NH35 combines automatic winding, manual winding, hacking seconds, and a quick-set date function, making it one of the most popular movements in modern watchmaking.
| Specification | Details |
|---|---|
| Manufacturer | TMI (Seiko Group) |
| Caliber | NH35 |
| Movement Type | Automatic with Manual Winding |
| Functions | Hours, Minutes, Seconds, Date |
| Jewels | 24 Jewels |
| Beat Rate | 21,600 BPH (3 Hz) |
| Power Reserve | Approx. 41 Hours |
| Diameter | 27.40 mm |
| Height | 5.32 mm |
| Accuracy | -20 / +40 seconds per day |
| Hacking Seconds | Yes |
| Country of Origin | Japan or Malaysia |
Operating Instructions
Automatic Winding
The NH35 automatically winds itself through the natural movement of your wrist while worn.
Manual Winding
If the watch has stopped:
- Turn the crown clockwise approximately 55 times to fully wind the mainspring.
- The watch will continue winding automatically while being worn.
Setting the Time
- Pull the crown to the second click.
- Turn the crown until the correct time is displayed.
- The second hand stops while setting the time for precise synchronization.
- Push the crown back to the normal position.
Setting the Date
- Pull the crown to the first click.
- Turn the crown to adjust the date.
- Push the crown back once the correct date is set.
Important: Do not change the date between 9:00 PM and 4:00 AM, as the calendar mechanism may be engaged.
Care & Maintenance
- Wear the watch regularly to keep the movement wound.
- If not worn for several days, manually wind before use.
- Avoid strong magnetic fields and severe impacts.
- Keep the crown fully pushed in (or screwed down if applicable).
- Professional servicing is recommended every 5–7 years, depending on usage and environmental conditions.
Why Choose the NH35?
- Genuine Japanese automatic movement
- Reliable date complication
- Manual winding capability
- Hacking seconds for precise time setting
- Approximately 41-hour power reserve
- Durable and easy to service
- One of the most trusted automatic movements in the watch industry
The TMI NH35 has earned its reputation as one of the most dependable automatic movements available. Its robust construction, proven reliability, and straightforward maintenance make it an excellent choice for everyday wear, dive watches, and sports watches alike.
