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This is a genuine MIYOTA 3H second wheel, made in Japan, designed for the 9100 automatic mechanical movement. It serves as the drive component for the month subdial at 3 o’clock, transmitting power to the month hand as one of the movement’s key complications. This product is brand new and original, not a generic replacement part.
Brand：MIYOTA (by CITIZEN)
Compatible Movement：9100 / 9132 automatic mechanical movements
Part Name：3H Second Wheel (month display drive)
Origin：Made in Japan
Quality：Genuine original, brand new
Function：Drives the month hand at 3 o’clock
Movement Diameter：30.2mm (13½ ligne)
Movement Height：5.52mm
Frequency：28,800 bph (4Hz)
Power Reserve：Approx. 40 hours
Jewels：26
1. Is this 3H second wheel an original CITIZEN/MIYOTA genuine part?
Yes. It is an original MIYOTA factory part, made in Japan.
2. What happens if the 3H second wheel is damaged?
The 3H second wheel drives the month display at 3 o’clock. Damage can cause the month hand to stop or misread, affecting this complication. Timely replacement is recommended.
3. Does this part come with installation tools or instructions?
No. This is a single precision component. Installation involves calendar/month mechanism disassembly and should be performed by a qualified watchmaker.
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