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The SEIKO (SII) NH36 is a genuine Japanese automatic mechanical movement manufactured by Hattori, widely used in Seiko and many other watch brands. Measuring 12‴ (approx. 27.4mm) with a slim 5.32mm height, it offers three hands, day-date display, and a stop-second device for precise time setting.
Genuine Hattori Movement – Produced by Seiko’s factory, not a clone or refurbished unit.
24 Jewels – Reduces friction for longer service life.
21,600 vph (3Hz) Frequency – Steady timekeeping and easy to service.
Stop‑Second Device – Seconds hand halts when crown is pulled out for precise time setting.
Day‑Date Display – Practical dual calendar function.
Winding Stem Included – Comes with original stem for direct replacement.
SOFLY Packing – Professional shock‑absorbent packaging for safe transit.
| Parameter | Details |
|---|---|
| Model | NH36 |
| Brand | SEIKO Instruments Inc. (SII) / Hattori |
| Type | Automatic mechanical |
| Size | 12‴ (approx. 27.4 mm) |
| Height | 5.32 mm |
| Functions | Three hands + day + date |
| Frequency | 21,600 vph (3 Hz) |
| Jewels | 24 |
| Stop‑second | Yes |
| Included | Winding stem |
| Condition | Brand new, genuine |
1. Is this a genuine SEIKO original NH36 movement?
Yes. The product clearly states “Genuine Hattori”, meaning it is produced by Seiko Instruments Inc. (SII) in Japan, not a third-party clone.
2. Does the movement come with a winding stem?
Yes. A genuine winding stem is included, so you don’t need to purchase it separately for installation.
3. What is the accuracy of this movement?
The NH36 typically runs within -20 to +40 seconds per day out of the factory. It can be regulated to achieve better accuracy. Its stability and reliability are well recognized among entry-level automatic movements.
4. Can I directly replace the old movement in my watch with this NH36?
If your watch originally uses an NH36 or a compatible movement (12‴, 27.4mm diameter, 5.32mm height), such as Seiko 4R36 or 7S36, it is generally a direct fit. However, pay attention to dial feet positions, date window alignment, and stem length. Professional installation is recommended.
5. What is SOFLY packing?
SOFLY is an official Seiko high-quality shock-absorbent packaging method that uses special foam to secure the movement, preventing vibration and impact damage during shipping. Simply unpack and use as normal.
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