Hattori Y121 Circuit Block Electronic Module
Hattori Y121 Circuit Block Electronic Module - Image 2

Hattori Y121 Circuit Block Electronic Module

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Product Description

This is a genuine Hattori Y121 circuit block electronic module, made in Japan, designed for the Y121 quartz movement. It serves as the core control component, generating the precise 32,768Hz quartz frequency signal to drive the stepper motor for hour, minute, and second hand timekeeping. The Y121 measures 6¾ × 8 ligne (15.30 × 18.20mm) with a thickness of approximately 2.99mm, uses a 377 (SR626SW) battery, with some versions offering up to 4 years of battery life. This product is brand new and original, intended for servicing and repair of Y121 movements.

Specifications

  • Brand：Hattori (by Seiko Time Corp./S. Epson)

  • Compatible Movement：Y121 / Y121E quartz movement (including Y121.1, Y121.4 high pinion versions)

  • Part Name：Circuit Block Electronic Module

  • Origin：Made in Japan

  • Quality：Genuine original, brand new

  • Function：Generates and processes time signals, drives stepper motor

FAQ

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 the Hattori Y121 series quartz movements (including Y121.1, Y121.4, Y121E variants). The movement measures 6¾ × 8 ligne (15.30 × 18.20mm) with 2.99mm thickness, featuring hour/minute/seconds hands and no date.

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. The Y121 offers accuracy of ±20 seconds/month—circuit failure directly impacts performance. Timely replacement is recommended.

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