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This is a genuine MIYOTA winding pinion (also known as clutch wheel) by CITIZEN, made in Japan, designed for the GM00 quartz movement. It is a core component of the keyless works and winding mechanism, transmitting rotational power from the crown to the setting mechanism or mainspring system for time setting and manual winding. This product is brand new and original, not a generic replacement part.
Brand：MIYOTA (by CITIZEN)
Movement Caliber：GM00
Part Name：Winding Pinion / Clutch Wheel
Origin：Made in Japan
Quality：Genuine original, brand new
Compatible Movement：MIYOTA GM00 quartz movement
Function：Transmits winding and setting power, connecting crown to movement gear train
Movement Size：10½ ligne (23.30mm)
1. Is this winding pinion an original CITIZEN/MIYOTA genuine part?
Yes. It is an original MIYOTA factory part, made in Japan, with MIYOTA branding on packaging or the part itself.
2. Which movements is this winding pinion compatible with?
This winding pinion is specifically designed for the MIYOTA GM00 quartz movement. The GM00 movement offers an accuracy of ±20 seconds per month and uses a 32,768Hz tuning fork type quartz crystal. Please verify your movement caliber is GM00 before installation. It may not be interchangeable with GM10 or GM15 models—check part numbers.
3. What happens if the winding pinion is worn or damaged?
A damaged winding pinion can cause inability to set time, winding failure, or rough operation, severely affecting normal watch use. This part is a wearable transmission component in quartz movements. Timely replacement is recommended upon detecting any abnormality.
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