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This is a genuine MIYOTA cannon pinion for the 8217 movement, made in Japan, designed for the 8217 automatic caliber. Positioned at the center of the movement, it is responsible for driving the minute hand and ensuring precise coordination between the minute and hour hands as the core transmission component for time display. This product is brand new and original, not a generic replacement part.
1. Is this cannon pinion an original CITIZEN/MIYOTA genuine part?
Yes. It is an original MIYOTA factory part, made in Japan. The 8217 is part of the 8200 series, featuring 24-hour display and quick date setting.
2. Which movements is this cannon pinion compatible with?
It fits the MIYOTA 8217 automatic caliber. The 8217 is a date movement with a 24-hour display at 9 o’clock. Verify your movement main plate is marked 8217 before installation.
3. What happens if the cannon pinion is worn or damaged?
The cannon pinion is a critical transmission component at the center of the movement. Wear or damage can cause the minute hand to stop, slip, wobble, or time setting to fail. Timely replacement is recommended. Cannon pinion tightness affects setting feel—excessive tightness may cause “back hacking” (seconds hand reversing when setting time), while looseness causes hand slipping.
4. Does this part come with installation tools or instructions?
No. This is a single precision component. Installation involves gear train disassembly and requires professional tools. Work should be performed by a qualified watchmaker.
5. How can I confirm this part fits my movement?
Check the caliber marking on the movement main plate for 8217. Perform a visual comparison with your old part (tooth profile, pipe outer diameter, fit height, etc.).
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