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This is a genuine Hattori VD55/VD57 circuit block electronic module, made in Japan, designed for the VD55/VD57 quartz chronograph movements. It serves as the core control component, generating the precise 32,768Hz quartz frequency signal to drive the stepper motor for chronograph and timekeeping functions. This product is brand new and original, intended for servicing and repair of VD55/VD57 movements.
Brand：Hattori (by Seiko Time Corp./TMI)
Compatible Movements：VD55 / VD57 quartz chronograph calibers
Part Name：Circuit Block (Electronic Module)
Origin：Made in Japan (Japan assembled)
Quality：Genuine original, brand new
Function：Generates and processes time signals, drives stepper motor
1. Is this circuit module an original Hattori genuine part?
Yes, made in Japan.
2. Which movements is this circuit module compatible with?
It fits Hattori VD55 and VD57 quartz chronograph movements. Both are 12¾ ligne size (29.50×26.00mm). VD55 height is 3.97mm, VD57 height is 4.57mm. Both feature the same layout: 1/10 sec counter at 12H, 60-min totalizer at 9H, small seconds at 6H, date at 3H.
3. What happens if the circuit module is damaged?
The circuit module is the core control component of the movement, generating the precise quartz signal and driving the motor. Damage can cause stoppage, chronograph malfunction, or inaccurate timekeeping. Timely replacement is recommended.
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