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The SEIKO (SII) NH35/NH36/NH37/NH38/NH39 Barrel Complete (0201083) is a genuine Seiko mainspring barrel assembly designed for the popular NH series automatic movements. This complete unit includes the barrel drum and pre-installed mainspring, ready for direct installation during movement servicing or repair. Manufactured in Japan to original Seiko specifications, it is essential for restoring reliable power reserve and stable timekeeping performance.
Genuine Seiko part – authentic Japanese-made component for NH35, NH36, NH37, NH38, and NH39 movements
Complete barrel assembly – includes mainspring barrel and mainspring as a ready-to-install unit
Pre-assembled for convenience – simplifies servicing, no separate mainspring fitting required
Restores power reserve – ensures stable energy storage and release for reliable timekeeping
Part Number: 0201083
Compatible Movements: Seiko NH35, NH36, NH37, NH38, NH39
Type: Complete barrel assembly (barrel + mainspring)
Manufacturer: Seiko / SII
Origin: Japan
Condition: Brand new
Service and overhaul of Seiko NH35, NH36, NH37, NH38, and NH39 movements
Barrel replacement – replacing worn, damaged, or slipping mainsprings
Power reserve restoration – ensuring proper energy storage and release
Suitable for professional watchmakers and experienced watch repair technicians
1. Is this a genuine Seiko / SII part?
Yes, this is a genuine Seiko (TMI) factory part made in Japan. It is not an aftermarket or generic copy.
2. Which movements does this barrel complete fit?
It fits NH35, NH36, NH37, NH38, and NH39 movements.
3. Is this compatible with the 6R5 series movements?
No, this barrel complete is not compatible with the 6R5 series or 6R35A movements, as the barrel and barrel lid shapes differ.
Fast worldwide shipping within 3 business days.
Competitive pricing on Seiko/Hattori calibers.
3,000+ watch movements and parts in stock.
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