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The SEIKO (SII) NH34 is a genuine Hattori automatic movement featuring a central GMT hand function. With 24 jewels, 21,600 vph (3 Hz), date display and stop‑second device, it is a reliable choice for GMT watch builds, repairs and replacements.
Central GMT hand – tracks a second time zone independently.
Stop‑second (hacking) – precise time synchronization.
Date display – quick‑set date function.
Automatic winding – bidirectional rotor with manual winding capability.
24 jewels – reduced friction, enhanced durability.
| Parameter | Value |
|---|---|
| Caliber | SEIKO NH34 (Hattori) |
| Diameter | 29.0 mm (13‴) |
| Height | 5.5 mm (including GMT) |
| Jewels | 24 |
| Frequency | 21,600 vph (3 Hz) |
| Power reserve | approx. 41 hours |
| Functions | Hours, minutes, GMT hand, sweep seconds, date, hacking |
| Winding | Automatic / manual |
| Hand sizes | Hour 1.50 mm, minute 0.90 mm, GMT 1.50 mm, seconds 0.20 mm |
Ideal for custom GMT watch builds or replacing a faulty movement.
Compatible with many 28.5 mm dials designed for NH34/NH35.
Suitable for dive watches, pilot watches, and travel watches requiring a second time zone.
Professional watch repair and restoration.
Q1: Is this a genuine SEIKO movement?
Yes, it is an original Hattori / SII caliber, not a clone.
Q2: Can I install it in a case designed for ETA 2836?
The NH34 is thicker (5.5 mm) and has different stem height. Check case compatibility before ordering.
Q3: Does the GMT hand move independently?
Yes, the GMT hand is set via the crown independent of the main hour hand.
Fast worldwide shipping within 3 business days.
Competitive pricing on Seiko/Hattori calibers.
3,000+ watch movements and parts in stock.
Trusted by watchmakers worldwide.
Personalized sourcing support via [email protected] or WhatsApp +86 18620212114.
