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The TMI/Seiko VD54 Movement Chronograph Second Wheel is a genuine Japanese-made component for the VD54 quartz chronograph movement, manufactured by Seiko Instruments Inc. (SII) and distributed by Time Module Inc. (TMI). Unlike conventional chronograph movements where the central hand is used for timing, the VD54 features a chronograph seconds hand located in a subdial at the 6 o’clock position . The center hand is instead used for regular timekeeping . This genuine part is essential for watchmakers restoring proper chronograph reset function when the original component becomes worn or damaged .
Genuine TMI/Seiko part – authentic Japanese-made component for the VD54 chronograph movement
Chronograph module component – drives the chronograph seconds hand at the 6 o’clock subdial
Distinctive VD54 layout – central second hand is for regular timekeeping, not chronograph function
Essential for service – commonly replaced when chronograph seconds hand fails to reset to zero
Compatible Movement: TMI/Seiko VD54 (including VD54A, VD54B, VD54C variants)
Movement Size: 12¾ ligne (approx. 29.5mm)
Movement Height: 3.97mm
Subdial Layout: Chronograph seconds at 6 o’clock, 60-minute counter at 9 o’clock, 24-hour indicator at 3 o’clock
Hand Sizes: Hour: 1.10mm / Minute: 0.65mm / Seconds: 0.20mm
Battery: 371 / SR920SW
Origin: Japan
Service and repair – replacing worn or damaged chronograph second wheels in VD54 movements
Chronograph function restoration – resolving issues with the 6 o’clock subdial seconds hand failing to reset to zero
Suitable for professional watchmakers and experienced repair technicians
1. Is this a genuine TMI/Seiko part?
Yes, this is a genuine Seiko (TMI) factory part made in Japan. The VD54 is a quartz chronograph movement manufactured by Seiko Instruments Inc. (SII) and distributed by Time Module Inc. (TMI) .
2. What is the function of the chronograph second wheel?
The chronograph second wheel drives the chronograph seconds hand located in the 6 o’clock subdial. The central second hand on the VD54 is for regular timekeeping, a distinctive feature of this movement .
3. What are the signs that the chronograph second wheel needs replacement?
Common signs include the chronograph seconds hand not resetting to zero, sticking, or moving irregularly during inspection. The VD54 allows reset adjustment by pulling the crown to position 1 and using the pushers .
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