TMI/Hattori SEIKO VJ21 Movement Second Wheel

Product Description

The TMI/Seiko VJ21 Movement Second Wheel is a genuine Japanese-made component for the VJ21 quartz watch movement . The VJ21 is a compact 6¾ x 8 ligne movement (approx. 15.30 x 17.80 mm) with a slim 2.28 mm height, widely used in fashion and everyday quartz watches . As part of the gear train, the second wheel transmits power from the movement to the central seconds hand, ensuring accurate time display . This genuine TMI/Seiko part is essential for watchmakers restoring proper timekeeping function when the original component becomes worn or damaged.

Features & Function

• Genuine TMI/Seiko part – authentic Japanese-made component for the VJ21 movement 

• Gear train component – drives the central seconds hand for accurate timekeeping 

• Compact design – designed for slim 2.28mm quartz movements 

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

Specifications

• Compatible Movement: TMI/Seiko VJ21, VJ21B 

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

• Movement Height: 2.28 mm 

• Hand Sizes: Hour: 1.20mm / Minute: 0.70mm / Seconds: 0.17mm 

• Battery: 364 / SR621SW 

• Hacking: Yes 

• Origin: Japan

Applications

• Service and repair – replacing worn or damaged second wheels in VJ21 movements

• Gear train restoration – ensuring smooth power transmission for accurate timekeeping

• 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 VJ21 is a quartz movement manufactured by Seiko Instruments Inc. (SII) and distributed by Time Module Inc. (TMI) .

2. Which movements is this second wheel compatible with?

This second wheel is compatible with the TMI/Seiko VJ21 and VJ21B movements. The VJ21 is an 6¾ x 8 ligne quartz caliber with 3 hands and no date .

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

Common signs include seconds hand not moving smoothly, stopping, or irregular timekeeping during movement 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.