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This is a genuine MIYOTA hour wheel by CITIZEN, made in Japan, designed for the FS00 quartz chronograph movement. By engaging with the minute wheel, it transmits power to the hour hand at a 12:1 reduction ratio for 12-hour time display. This product is brand new and original, not a generic replacement part.
Brand：MIYOTA (by CITIZEN)
Compatible Movement：FS00 quartz chronograph movement (FS00/FS03/FS05 series)
Part Name：Hour Wheel
Origin：Made in Japan
Quality：Genuine original, brand new
Function：Drives the hour hand (with 12:1 reduction ratio from the minute wheel)
Movement Size：10½ ligne (approx. Ø23.30mm)
Movement Height：4.13mm (FS00 overall height)
Battery：377 (SR626SW)
Accuracy：±20 seconds/month
1. Is this hour wheel an original CITIZEN/MIYOTA genuine part?
Yes. It is an original MIYOTA factory part, made in Japan.
2. Which movements is this hour wheel compatible with?
It fits the FS00 quartz chronograph movement (FS00/FS03/FS05 series). The FS00 features a 3‑eye chronograph with date at 3 o’clock (or 6 o’clock), small seconds at 6 o’clock, 60‑minute totalizer at 10 o’clock, and 24‑hour display at 2 o’clock. Verify your movement caliber is FS00/FS03/FS05.
3. What happens if the hour wheel is worn or damaged?
A damaged hour wheel can cause the hour hand to stop, run incorrectly, or jam, affecting the readability of time. The precision of the 12:1 gear ratio with the minute wheel directly impacts timekeeping accuracy. Timely replacement is recommended upon detecting any abnormality.
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