
$1.00
You Saved
The TMI/Seiko VX3JA Movement Third Wheel is a genuine Japanese-made component for the VX3JA multifunction quartz movement. As an integral part of the gear train, the third wheel transmits power from the movement’s motor to drive the central seconds hand for accurate timekeeping . This genuine TMI/Seiko part is essential for watchmakers restoring proper timekeeping function when the original component becomes worn or damaged.
Genuine TMI/Seiko part – authentic Japanese-made component for the VX3JA movement
Gear train component – transmits power to drive the central seconds hand for accurate timekeeping
Multifunction compatibility – part of the VX3JA’s three-eye layout with day, date, and 24-hour subdials
Essential for service – commonly replaced when seconds hand operation becomes irregular
Compatible Movement: TMI/Seiko VX3JA
Movement Size: 10½ ligne (approx. 23.3mm)
Functions: Central seconds, day, date, and 24-hour indicators
Jewels: 1 jewel
Origin: Japan
Service and repair – replacing worn or damaged third wheels in VX3JA movements
Gear train restoration – ensuring smooth power transmission for accurate timekeeping
Suitable for professional watchmakers and experienced repair technicians
1. Is this a genuine TMI/Seiko part?
Yes, this is a genuine TMI (Seiko) part made in Japan. The VX3JA is a multifunction quartz movement produced by Seiko’s Time Module Inc. (TMI) division .
2. What is the function of the third wheel in this movement?
The third wheel is part of the gear train that drives the central seconds hand. In the VX3JA movement, it works with the other wheels to transmit power from the motor to the hands for accurate time display .
3. What are the signs that the third wheel needs replacement?
Common signs include seconds hand not moving smoothly, irregular timekeeping, or visible wear/damage during movement inspection. A qualified watchmaker can diagnose these issues.
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.









