SEIKO (SII) NH05/NH06 Balance Wheel

Product Description

The SEIKO (SII) NH05/NH06 Balance Wheel is a genuine Seiko balance assembly for the compact NH05 and NH06 automatic movements. This critical component, comprising the balance wheel and hairspring, regulates the timekeeping accuracy of the movement. Manufactured in Japan to original Seiko specifications, this is a direct replacement part for professional watchmakers servicing or repairing these calibers.

Features & Function

• Genuine Seiko part – authentic Japanese-made balance assembly for NH05 and NH06 movements

• Precision timekeeping regulation – controls the oscillation rate for accurate timekeeping

• Compatible with compact calibers – designed for 17.5mm movements used in smaller watches

• Drop-in replacement – direct fit for the original balance assembly

• Durable construction – manufactured to Seiko’s original quality standards

Specifications

• Compatible Movements: Seiko NH05, NH06 (NH05 features date display; NH06 features day and date display)

• Movement Diameter: 17.5 mm (outside)

• Total Height: 5.92 mm

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

• Jewels: 21 jewels

• Power Reserve: More than 40 hours

• Manufacturer: Seiko / SII (Time Module Inc.)

• Origin: Japan

• Condition: Brand new

Applications

• Service and overhaul of Seiko NH05 and NH06 movements

• Balance assembly replacement – replacing damaged, broken, or worn balance wheels and hairsprings

• Timekeeping restoration – restoring correct amplitude and rate to the movement

• 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 balance wheel fit?
It fits NH05 and NH06 movements. These are compact 17.5mm calibers used in smaller watches, with NH05 featuring date display and NH06 featuring day and date display.

3. What are the signs that the balance wheel needs replacement?
Common signs include broken balance staff, damaged hairspring, poor amplitude, erratic rate, or physical damage 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.