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This is a genuine MIYOTA hour wheel for the 0S20 movement, made in Japan, designed for the 0S20 quartz chronograph caliber. It serves as a core transmission component of the timekeeping system, transmitting power from the minute wheel to the hour hand for 12-hour time display. This product is brand new and original, not a generic replacement part.
Brand：MIYOTA (by CITIZEN)
Compatible Movement：0S20 quartz chronograph caliber (including 0S2A variants)
Part Name：Hour Wheel
Part Number：MY075.523
Origin：Made in Japan
Quality：Genuine original, brand new
Function：Drives the hour hand
1. Is this hour wheel an original CITIZEN/MIYOTA genuine part?
Yes, made in Japan.
2. Which movements is this hour wheel compatible with?
It fits MIYOTA 0S20 series chronograph calibers (and 0S2A variants). The movement measures 13½ ligne (approx. 30.80mm) with 5.10mm height. The layout features: 60-minute totalizer at 9 o’clock, small seconds at 6 o’clock, 24-hour display at 3 o’clock, and date at 4:30.
3. What happens if the hour wheel is damaged?
The hour wheel is a core component for driving the hour hand. Damage can cause the hour hand to stop, run incorrectly, or jam, affecting time readability. The 0S20 offers accuracy of ±20 seconds/month—hour wheel precision directly impacts timekeeping. Timely replacement is recommended.
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