TMI/Hattori SEIKO VJ20 Movement Cannon Pinion

Product Description

The TMI/Seiko VJ20 Movement Cannon Pinion is a genuine Japanese-made component for the compact VJ20 quartz watch movement. As a core part of the motion work, the cannon pinion transmits power from the gear train to the minute hand, and also drives the hour wheel through the minute wheel to enable accurate time display. This movement is a slim 6¾ x 8 ligne caliber (approx. 15.30 x 17.80 mm) with a height of just 2.28mm, widely used in two-hand fashion and everyday quartz watches.

Features & Function

• Genuine TMI/Seiko part – authentic Japanese-made component for the VJ20 movement

• Motion work component – drives the minute hand and hour wheel for accurate timekeeping

• Compact design – designed for slim 2.28mm two-hand movements

• Essential for service – commonly replaced when hand operation becomes irregular

Specifications

• Compatible Movement: TMI/Seiko VJ20, VJ20A, VJ20B, VJ20C 

• Movement Size: 6¾ x 8 ligne (approx. 15.30 x 17.80 mm) 

• Movement Height: 2.28 mm 

• Hour Wheel Height: 0.80 mm 

• Hand Sizes: Hour: 1.20mm / Minute: 0.70mm 

• Functions: Hour and minute only (no date, no seconds) 

• Battery: 364 / SR621SW 

• Hacking: Yes 

• Origin: Japan 

Applications

• Service and repair – replacing worn or damaged cannon pinions in VJ20 movements

• Motion work restoration – ensuring smooth and accurate hand alignment

• Suitable for professional watchmakers and experienced repair technicians

FAQs

1. Is this a genuine TMI/Seiko part?
Yes, this is a genuine Seiko (TMI) factory part made in Japan. The VJ20 is a quartz movement manufactured by Seiko Instruments Inc. (SII) and distributed by Time Module Inc. (TMI) .

2. Which movements is this cannon pinion compatible with?
This cannon pinion is compatible with the TMI/Seiko VJ20, VJ20A, VJ20B, and VJ20C movements . These are 6¾ x 8 ligne quartz calibers with two hands (hour and minute) and no date function .

3. What are the signs that the cannon pinion needs replacement?
Common signs include minute hand not advancing correctly, slipping when setting the time, or visible wear/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.