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This is a genuine TMI/Hattori SEIKO VJ12 circuit block electronic module, made in Japan, designed for the VJ12 quartz movement. It serves as the core control component, generating precise quartz frequency signals to drive the stepper motor for hour, minute, and second hand timekeeping with date display at 3 o’clock. This product is brand new and original, intended for servicing and repair of VJ12 movements.
Brand：TMI / Hattori / Seiko Instruments Inc.
Compatible Movement：VJ12 quartz caliber (3-hand with date)
Part Name：Circuit Block Electronic Module
Origin：Made in Japan
Quality：Genuine original, brand new
Function：Generates and processes time signals, drives stepper motor
1. Is this circuit module an original Seiko genuine part?
Yes. It is an original TMI/Hattori factory part, made in Japan.
. Which movements is this circuit module compatible with?
It fits the TMI/Hattori SEIKO VJ12 series quartz movements (8¾ ligne, approx. 18.00×18.00mm). This is a 3-hand with date movement (date at 3 o’clock) featuring hacking seconds. The VJ12 is also available in a 6 o’clock date version (VJ12-D6). Verify the date position before installation.
3. What happens if the circuit module is damaged?
The circuit module is the core control component of the movement, generating the precise quartz oscillation signal and driving the motor. Damage can cause stoppage or inaccurate timekeeping, and the date may fail to advance.
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