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This is a genuine MIYOTA fifth wheel for the 1M02 movement, made in Japan, designed for the 1M02 day-date quartz caliber. Positioned between the third wheel and the seconds wheel, it serves as an intermediate gear in the gear train, transmitting power from the third wheel to the seconds wheel for accurate timekeeping. This product is brand new and original, not a generic replacement part.
Brand：MIYOTA (by CITIZEN)
Compatible Movement：1M02 quartz caliber (3-hand day-date)
Part Name：Fifth Wheel (Intermediate Gear)
Part Number：084-2500
Origin：Made in Japan
Quality：Genuine original, brand new
Function：Power transmission from third wheel to seconds wheel
1. Is this fifth wheel an original CITIZEN/MIYOTA genuine part?
Yes, made in Japan.
2. Which movements is this fifth wheel compatible with?
It fits the MIYOTA 1M02 day-date quartz caliber (10½ ligne, 23.7mm × 22.6mm). This is a 3-hand day-date movement with hacking seconds.
3. What happens if the fifth wheel is damaged?
The fifth wheel is an intermediate gear in the gear train, positioned between the third wheel and the seconds wheel. Damage can cause timekeeping errors, hand stoppage, or power transmission failure. The 1M02 offers accuracy of ±20 seconds/month—fifth wheel precision directly impacts performance. Timely replacement is recommended.
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