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This is a genuine MIYOTA 12H minute recording wheel for the 0S10/0S20 movement, made in Japan, designed for the 0S10/0S20 quartz chronograph calibers. It serves as the dedicated drive component for the 60-minute chronograph totalizer at 12 o’clock, transmitting power to the chronograph minute hand as a core transmission component of the chronograph function. This product is brand new and original, not a generic replacement part.
Brand：MIYOTA (by CITIZEN)
Compatible Movements：0S10 / 0S20 quartz chronograph calibers
Part Name：12H Minute Recording Wheel (60-minute totalizer drive)
Origin：Made in Japan
Quality：Genuine original, brand new
Function：Drives the 60-minute chronograph totalizer at 12 o’clock
1. Is this 12H minute recording wheel an original CITIZEN/MIYOTA genuine part?
Yes. It is an original MIYOTA factory part, made in Japan.
2. Which movements is this part compatible with?
It fits MIYOTA 0S10 and 0S20 series chronograph calibers. Both measure 13½ ligne (30.80mm) with the layout: 60-minute totalizer at 12 o’clock, small seconds at 6 o’clock, 12-hour totalizer at 9 o’clock, and date at 3 o’clock. Verify your movement main plate marking before installation.
3. What happens if the 12H minute recording wheel is damaged?
This wheel drives the 60-minute chronograph totalizer at 12 o’clock. Damage can cause the chronograph minute hand to stop or accumulate incorrectly, affecting chronograph function. The 0S10 offers 1/1 second chronograph precision up to 12 hours. Timely replacement is recommended.
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