SEIKO (SII) NH35/NH36/NH37/NH38/NH39 Escape Wheel #0251300

Product Description

The SEIKO (SII) NH35/NH36/NH37/NH38/NH39 Escape Wheel (#0251300) is a genuine Japanese-made component for the popular NH series automatic movements . As a critical part of the escapement system, the escape wheel works with the pallet fork to regulate the release of energy from the gear train, ensuring stable amplitude and accurate timekeeping . This brand new original part is essential for watchmakers restoring proper escapement function when the original escape wheel becomes worn or damaged.

Features & Function

• Genuine Seiko/SII part – authentic Japanese-made component for NH35, NH36, NH37, NH38, and NH39 movements 

• Escapement system component – regulates energy release from the gear train for accurate timekeeping 

• NH family compatibility – compatible across the most popular NH series calibers 

• Direct replacement – drop-in replacement for worn or damaged escape wheels

Specifications

• Part Number: 0251300

• Compatible Movements: Seiko NH35, NH36, NH37, NH38, NH39 (also known as 4R35/36/37/38/39) 

• Movement Family: NH Series (Basic Mechanical Series) 

• Movement Diameter: 27.4 mm 

• Movement Height: 5.32 mm 

• Jewels: 24 

• Beat Rate: 21,600 vph (3 Hz) 

• Power Reserve: >41 hours 

• Accuracy: -20 to +40 seconds/day (factory spec) 

• Origin: Japan

Applications

• Service and overhaul – replacing worn or damaged escape wheels in NH series movements

• Escapement repair – resolving issues with irregular amplitude, unstable rate, or intermittent stopping 

• Timekeeping restoration – ensuring stable energy transfer for accurate timekeeping

• Suitable for professional watchmakers and experienced repair technicians

FAQs

1. Is this a genuine Seiko/SII part?

Yes, this is a genuine Seiko (SII/TMI) factory part made in Japan. The NH series is manufactured by Seiko Instruments Inc. (SII) and distributed by Time Module Inc. (TMI) .

2. Which movements is this escape wheel compatible with?

This escape wheel is compatible with Seiko NH35, NH36, NH37, NH38, and NH39 movements . These are based on the same architecture, with differences in complications: NH35 is date-only, NH36 adds day-date, NH37 adds a 24-hour indicator, NH38 is no-date open-heart, and NH39 adds a 24-hour subdial .

3. What are the signs that the escape wheel needs replacement?

Common signs include irregular amplitude, unstable rate, intermittent stopping, or visible wear/damage to the 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.

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• Personalized sourcing support via [email protected] or WhatsApp +86 18620212114.