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This is a genuine MIYOTA coil block for the FS00 movement, made in Japan, designed for the FS00 quartz chronograph caliber. It serves as the core drive component of the stepper motor, converting electrical pulses from the circuit board into magnetic force to drive the gear train for precise timekeeping and chronograph functions. This product is brand new and original, intended for servicing and repair of FS00 movements.
Brand：MIYOTA (by CITIZEN)
Compatible Movement：FS00 quartz chronograph caliber
Part Name：Coil Block
Origin：Made in Japan
Quality：Genuine original, brand new
Function：Converts electrical pulses to magnetic force to drive stepper motor
1. Is this coil block an original MIYOTA genuine part?
Yes. It is an original MIYOTA factory part, made in Japan, manufactured by Citizen’s MIYOTA division.
2. Which movements is this coil block compatible with?
It fits the MIYOTA FS00 quartz chronograph movement (10½ ligne, 23.70mm, 4.13mm height). This is a 3-eye chronograph movement featuring 24-hour at 2H, small seconds at 6H, 60-minute totalizer at 10H, and date at 4/6H. The FS00 belongs to the FS family alongside FS10 and FS20.
3. What happens if the coil block is damaged?
The coil block is the core drive component of the stepper motor. Common symptoms include: movement not running after battery replacement, noticeable time gain/loss, or intermittent stoppage. The FS00 uses a 377 (SR626SW) battery with approximately 2 years of battery life. Timely replacement is recommended.
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