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This is a genuine MIYOTA second wheel by CITIZEN, made in Japan, designed for the FS00 quartz chronograph movement. It serves as a core component of the movement’s gear train, transmitting power from the stepper motor to the central chronograph seconds hand for precise timing operations. This product is brand new and original, not a generic replacement part.
Brand：MIYOTA (by CITIZEN)
Compatible Movement：FS00 quartz chronograph movement
Part Name：Second Wheel (central chronograph seconds drive)
Origin：Made in Japan
Quality：Genuine original, brand new
Function：Drives the central chronograph seconds hand
Movement Size：10½ ligne (Ø23.7mm)
Movement Height：4.13mm
Battery：377 (SR626SW)
Accuracy：±20 seconds/month
1. Is this second wheel an original CITIZEN/MIYOTA genuine part?
Yes. It is an original MIYOTA factory part, made in Japan.
2. Which movements is this second wheel compatible with?
It fits the FS00 quartz chronograph movement. The FS00 features a 3‑eye chronograph with 60‑minute totalizer at 10 o’clock, small seconds at 6 o’clock, 24‑hour display at 2 o’clock, and date at 4 or 6 o’clock. Verify your movement caliber is FS00.
3. What happens if the second wheel is damaged?
A damaged second wheel can cause the central chronograph seconds hand to stop, skip, or fail to reset, affecting chronograph functionality. As a continuously driven component in the gear train, timely replacement is recommended.
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