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This is a genuine MIYOTA coil block for GM00 and GL00 quartz movements, made in Japan. It serves as the core drive component of the stepper motor, converting electrical pulses from the circuit board into magnetic force to drive the hands. The GM00 measures 10½ ligne (23.30mm) and the GL00 measures 6¾ × 8 ligne (approx. 15.30 × 18.20mm) , both using 364 (SR621SW) batteries . This product is brand new and original, intended for servicing and repair of GM00/GL00 movements.
Brand：MIYOTA (by CITIZEN)
Compatible Movements：GM00 / GL00 quartz calibers
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.
2. Are the GM00 and GL00 coil blocks interchangeable?
No. The movements differ in size: GM00 is 10½ ligne (23.30mm) , while GL00 is 6¾ × 8 ligne (15.30 × 18.20mm) —the coil blocks are physically incompatible.
3. Which movements is this coil block compatible with?
It fits MIYOTA GM00 and GL00 quartz movements. The GM00 series features 3 hands with day/date display , while the GL00 series is a 3-hand with date movement .
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