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This is a genuine MIYOTA second wheel for the 1M12 movement, made in Japan, designed for the 1M12 quartz caliber. It serves as the final output gear of the timekeeping system, driving the central seconds hand to step every second for precise timekeeping. This product is brand new and original, not a generic replacement part.
Brand：MIYOTA (by CITIZEN)
Compatible Movement：1M12 quartz caliber (3-hand with date)
Part Name：Second Wheel
Origin：Made in Japan
Quality：Genuine original, brand new
Function：Drives the central seconds hand
1. Is this second wheel an original CITIZEN/MIYOTA genuine part?
Yes. It is an original MIYOTA factory part, made in Japan.
2. Which movements is this second wheel compatible with?
It fits the MIYOTA 1M12 quartz caliber (10½ ligne size). This is a 3-hand with date movement featuring hacking seconds. The 1M12 is part of the 1L/1M series of affordable quartz calibers, now superseded by GM10 or GM12. Verify your movement model before installation.
3. What happens if the second wheel is damaged?
The second wheel is the final output gear of the timekeeping system. Damage can cause the seconds hand to stop, wobble, or jam, affecting normal timekeeping. The 1M12 offers accuracy of ±20 seconds/month—second wheel precision directly impacts timekeeping. Timely replacement is recommended.
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