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This is a genuine MIYOTA circuit block electronic module (Part No. 279-467) for the 1M02 movement, made in Japan, designed for the 1M02 quartz caliber. It serves as the core control component, generating precise quartz oscillation signals to drive the stepper motor for accurate timekeeping. This product is brand new and original, intended for repairing movements that fail to run due to circuit failure.
Part Number：279-467 (Circuit Module)
Compatible Movement：1M02 quartz caliber (10½ ligne)
Origin：Made in Japan
Quality：Genuine original, brand new
Function：Generates and processes time signals for stepper motor
1. Is this circuit module an original MIYOTA genuine part?
Yes. It is an original MIYOTA factory part (Part No. 279-467), made in Japan, manufactured by Citizen’s MIYOTA division.
2. Which movements is this circuit module compatible with?
It fits the MIYOTA 1M02 quartz caliber (10½ ligne, 23.30×22.60mm, 2.94mm height). The 1M02 is a 3-hand day-date movement (day/date at 3 o’clock), also compatible with 1N12, 1L02, 1M12, 1L12 series calibers.
3. What are the symptoms of circuit module failure?
The circuit module is the core control component (the “brain” of the movement). Common symptoms include: movement not running after battery replacement, noticeable time gain/loss, or intermittent stoppage. The 1M02 uses a 364 (SR621SW) battery—circuit failure directly impacts timekeeping. Timely replacement is recommended.
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