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This is a genuine MIYOTA circuit block electronic module (Part No. 279-751) for the 5R32 movement, made in Japan, designed for the 5R32 super-small 3-hand quartz caliber. It serves as the “brain” of the movement, integrating a quartz oscillator (32,768Hz) and a CMOS integrated circuit to generate precise time base signals for the stepper motor. This product is brand new and original, intended for repairing movements that fail to run due to circuit failure.
Part Number：279-751
Compatible Movement：5R32 super-small 3-hand quartz caliber
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. 279-751), made in Japan, manufactured by Citizen’s MIYOTA division.
2. Which movements is this circuit module compatible with?
It fits the MIYOTA 5R32 3-hand quartz caliber (3¾ × 6 ligne, 9.00×13.20mm, 2.00mm height). The 5R32 is a 3-hand, no-date movement specifically designed for ladies’ watches. This module does not fit the 5R21 (2-hand) caliber.
3. What are the symptoms of circuit module failure?
The circuit module is the core control component of the movement. Common symptoms include: movement not running after battery replacement, noticeable time gain/loss, or intermittent stoppage. The 5R32 offers accuracy of ±20 seconds/month with a battery life of approximately 2 years. The 5R32 features hacking seconds. Timely replacement is recommended.
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