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This is a genuine MIYOTA reduction wheel for the 9015 movement, made in Japan, designed for the 9015 premium automatic caliber. It serves as a key transmission component in the automatic winding system, converting the bidirectional rotor motion into unidirectional mainspring winding power. This product is brand new and original, not a generic replacement part.
Brand：MIYOTA (by CITIZEN)
Compatible Movement：9015 premium automatic caliber
Part Name：Reduction Wheel
Part Number：088-254
Origin：Made in Japan
Quality：Genuine original, brand new
Function：Automatic winding power conversion, transmits rotor motion to mainspring
Movement Height：3.90mm
Movement Size：11½ ligne (25.94mm)
1. Is this reduction wheel an original CITIZEN/MIYOTA genuine part?
Yes. It is an original MIYOTA factory part with part number 088-254, made in Japan.
2. What happens if the reduction wheel is damaged?
The reduction wheel is a critical component of the automatic winding system. Damage can cause reduced or complete loss of automatic winding efficiency, leaving only manual winding to power the movement. It is secured by a tiny spring clip, making disassembly challenging. Timely replacement is recommended.
3. Does this part come with installation tools or instructions?
No. This is a single precision component. Installation involves disassembly of the automatic winding mechanism. The spring clip securing the reduction wheel is very small and difficult to handle. Work should be performed by a qualified watchmaker.
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