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The SEIKO (SII) NH35/NH36/NH37/NH38/NH39 Minute Wheel (#0261190) is a genuine Japanese-made component for the popular NH series automatic movements. As a core part of the motion work, the minute wheel transmits power from the gear train to drive the minute hand and works in conjunction with the hour wheel and cannon pinion to enable accurate time display . This brand new original part is essential for watchmakers restoring proper timekeeping function when the original component becomes worn or damaged.
Genuine Seiko/SII part – authentic Japanese-made component for all major NH series calibers
Motion work component – drives the minute hand for accurate time display
NH family compatibility – compatible across NH35, NH36, NH37, NH38, and NH39 variants
Direct replacement – drop-in replacement for worn or damaged minute wheels
Part Number: 0261190
Compatible Movements: Seiko NH35, NH36, NH37, NH38, NH39
Movement Family: NH Series (Basic Mechanical Series)
Movement Diameter: 27.4 mm
Movement Height: 5.32 mm
Jewels: 24
Frequency: 21,600 vph (3 Hz)
Power Reserve: >41 hours
Hand Sizes: Hour: 1.50 mm / Minute: 0.90 mm / Seconds: 0.21 mm
Origin: Japan
Service and overhaul – replacing worn or damaged minute wheels in NH series movements
Motion work restoration – ensuring smooth and accurate hand alignment
Suitable for professional watchmakers and experienced repair technicians
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). The NH prefix indicates the movement is sold without Seiko branding for use by third-party watch manufacturers and the mod community .
2. Which movements is this minute wheel compatible with?
This minute wheel is compatible with Seiko NH35, NH36, NH37, NH38, and NH39 movements. These calibers share the same base architecture (NH35), with differences primarily in complications: NH35 is date-only, NH36 adds day-date, NH37 adds a 24-hour indicator, NH38 is a no-date open-heart, and NH39 adds a 24-hour subdial . The motion work components are shared across all these variants.
3. What are the signs that the minute wheel needs replacement?
Common signs include minute hand not advancing correctly, jerky hand movement, slipping during time setting, or visible wear/damage during inspection. A qualified watchmaker can diagnose these issues during servicing.
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