SEIKO (SII) NH05/NH06 Barrel Complete
SEIKO (SII) NH05/NH06 Barrel Complete - Image 2

SEIKO (SII) NH05/NH06 Barrel Complete

$4.00
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Quantity Discount (%) Price
1 - 2 — $4.00
3 - 4 5 % $3.80
5 - 9 7 % $3.72
10 - 14 10 % $3.60
15+ 15 % $3.40
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Product Description

The SEIKO (SII) NH05/NH06 Barrel Complete is a genuine Seiko mainspring barrel assembly designed for the compact NH05 and NH06 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 in these smaller calibers.

Features & Function

  • Genuine Seiko part – authentic Japanese-made component for NH05 and NH06 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

Specifications

  • Compatible Movements: Seiko NH05, NH06 (also listed with NH15/NH16 as larger versions)

  • Movement Diameter: 17.5 mm (outside) 

  • Total Height: 5.92 mm 

  • Frequency: 21,600 vibrations per hour (3 Hz) 

  • Jewels: 21 

  • Power Reserve: More than 40 hours 

  • Manufacturer: Seiko / SII

  • Origin: Japan

  • Condition: Brand new

Applications

  • Service and overhaul of Seiko NH05 and NH06 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

FAQs

1. Is this a genuine Seiko / SII part?
Yes, this is a genuine Seiko (SII) factory part made in Japan. It is not an aftermarket or generic copy.

2. Which movements does this barrel complete fit?
It fits NH05 and NH06 movements. These are compact 17.5mm calibers used in smaller watches. NH05 features date display, while NH06 features day and date display .

3. What are the signs that the barrel needs replacement?
Common signs include reduced power reserve, low amplitude, uneven rate, or visible wear/damage to the barrel teeth during inspection. A qualified watchmaker can diagnose these issues.

Why Choose SOFLY Watch Parts?

  • 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.

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