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The SEIKO (SII) NH16 Mechanical Movement is a reliable automatic caliber designed for precision timekeeping. With a day-date display, 21 jewels, and a vibration frequency of 21,600 bph (3 Hz), this movement delivers stable performance and long-term durability. Its compact build makes it ideal for both new watch projects and replacement needs.
Day-Date Function – Clear and practical dual calendar display.
Automatic Winding with Hacking – Powered by wrist movement, with stop-seconds for precise setting.
Durable Construction – Equipped with 21 functional jewels to minimize friction and extend lifespan.
Reliable Frequency – Runs at 21,600 vibrations per hour, ensuring smooth timekeeping.
Genuine Hattori Quality – Original SEIKO Instruments (SII) manufacture, trusted worldwide.
| Parameter | Details |
|---|---|
| Size | 10½‴ |
| Height | 6.01 mm |
| Display | 3 Hands / Day-Date |
| Frequency | 21,600 vibrations per hour (3 Hz) |
| Jewels | 21 |
| Winding Stem | Included |
| Packing | SOFLY secure packing |
| Condition | Brand New |
| Authenticity | Genuine Hattori (SEIKO SII) |
The SEIKO NH16 is widely used in affordable automatic watches and is a preferred movement for brands seeking reliable Japanese calibers. It is suitable for:
Watch repairs and replacements
Custom or microbrand watch projects
Training use for watchmaking students
Fast & Reliable Shipping – Orders processed within 3 business days and shipped worldwide.
Competitive Pricing – Affordable rates with special offers like $5 off $50+ using code SOFLYGO.
Extensive Inventory – 3,000+ calibers and parts in stock, including SEIKO, ETA, Miyota, Ronda.
Trusted Quality – Genuine components trusted by watchmakers, service centers, and collectors.
Personalized Sourcing – Looking for a specific SEIKO or TMI movement? Contact us at [email protected] or via WhatsApp +86 18620212114.
Q1: Is the NH16 the same as the NH35?
No. The NH16 features a day-date display, while the NH35 includes only the date.
Q2: Does the movement come with a battery?
No. The NH16 is a mechanical automatic movement, powered by wrist motion or manual winding, so it does not require a battery.
Q3: Is this movement genuine SEIKO (Hattori)?
Yes. This is a 100% genuine SEIKO Instruments (SII) Hattori movement, made in Japan.
Q4: Can it be hand-wound?
Yes, the NH16 supports both automatic winding and manual winding for flexibility.









