---
description: Genuine MIYOTA GL20 circuit module (279-K057), made in Japan. For GL/GM series quartz signal control and stepper motor drive, fits SR621SW battery.
title: MIYOTA/CITIZEN GL20 Circuit Block Electronic Module - Sofly
image: https://www.soflypart.com/wp-content/uploads/2019/05/GL20C.jpg
---
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- **MIYOTA/CITIZEN GL20 Circuit Block Electronic Module**
[](https://www.soflypart.com/wp-content/uploads/2019/05/GL20C.jpg)
[](https://www.soflypart.com/wp-content/uploads/2019/05/GL20CB.jpg)
# MIYOTA/CITIZEN GL20 Circuit Block Electronic Module
$3.50
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| Brand | Choose an option MIYOTA- 
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### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 4 | — | $3.50 |
| 5 - 9 | 5% | $3.33 |
| 10+ | 10% | $3.15 |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 4 | — | $3.50 |
| 5 - 9 | 5% | $3.33 |
| 10+ | 10% | $3.15 |
MIYOTA/CITIZEN GL20 Circuit Block Electronic Module quantity
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## Product Description
This is a **genuine MIYOTA circuit block electronic module (Part No. 279-K057)** for the **GL20 slim quartz movement**, **made in Japan**. Manufactured using **COB (Chip On Board) technology** with an integrated **32,768Hz quartz crystal**, it serves as the **core control component** of the movement, generating stable pulse signals for the stepper motor to ensure precise timekeeping. This product is **brand new and original**, intended for servicing and repair of compatible movements.
## Specifications
- **Part Number**：**279-K057**
- **Compatible Movements**：**GL20 / GL22 / GL30** slim series and **GM00 / GM10 / GM12 / GM15** series quartz calibers
- **Origin**：**Made in Japan**
- **Quality**：**Genuine original**, brand new
- **Function**：**Generates and processes time signals**, drives stepper motor
- **Technology**：**COB (Chip On Board)**
- **Frequency**：**32,768Hz** (tuning fork type quartz crystal)
## FAQ
**1. Is this circuit module an original MIYOTA genuine part?**
Yes. It is an **original MIYOTA factory part** (Part No. **279-K057**), **made in Japan.**
**2. Which movements is this circuit module compatible with?**
It fits **MIYOTA GL20, GL22, GL30** slim series and **GM00, GM10, GM12, GM15** series quartz movements. This module is fully compatible with the GL20. Verify the caliber marking on your movement main plate before installation.
**3. What are the symptoms of circuit module failure?**
The circuit module is the **core control component** of the movement. Common symptoms include: **movement not running after battery replacement**, **noticeable time gain/loss**, or **intermittent stoppage**. The GL20 uses an **SR621SW battery**—circuit failure directly impacts timekeeping. **Timely replacement** is recommended.
## Why Choose SOFLY Watch Parts?
**Fast Worldwide Shipping** – Orders are dispatched within 3 business days.
**Competitive Pricing** – Great value across watch movements, replacement parts and watchmaking tools.
**Extensive Selection** – More than 3,000 watch movements, parts and accessories available.
**Trusted Worldwide** – Trusted by watchmakers, repair professionals and watch enthusiasts worldwide.
**Personalized Sourcing** – Can’t find the part you need? Contact **info@soflypart.com** or WhatsApp **+86 18620212114.**
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Manufactured using\u00a0COB (Chip On Board) technology\u00a0with an integrated\u00a032,768Hz quartz crystal, it serves as the\u00a0core control component\u00a0of the movement, generating stable pulse signals for the stepper motor to ensure precise timekeeping. This product is\u00a0brand new and original, intended for servicing and repair of compatible movements. Specifications Part Number\uff1a279-K057 Compatible Movements\uff1aGL20 / GL22 / GL30\u00a0slim series and\u00a0GM00 / GM10 / GM12 / GM15\u00a0series quartz calibers Origin\uff1aMade in Japan Quality\uff1aGenuine original, brand new Function\uff1aGenerates and processes time signals, drives stepper motor Technology\uff1aCOB (Chip On Board) Frequency\uff1a32,768Hz\u00a0(tuning fork type quartz crystal) FAQ 1. Is this circuit module an original MIYOTA genuine part? Yes. It is an\u00a0original MIYOTA factory part\u00a0(Part No.\u00a0279-K057),\u00a0made in Japan. 2. Which movements is this circuit module compatible with? 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Common symptoms include:\u00a0movement not running after battery replacement,\u00a0noticeable time gain/loss, or\u00a0intermittent stoppage. The GL20 uses an\u00a0SR621SW battery\u2014circuit failure directly impacts timekeeping.\u00a0Timely replacement\u00a0is recommended. Why Choose SOFLY Watch Parts? Fast Worldwide Shipping\u00a0\u2013 Orders are dispatched within 3 business days. Competitive Pricing\u00a0\u2013 Great value across watch movements, replacement parts and watchmaking tools. Extensive Selection\u00a0\u2013 More than 3,000 watch movements, parts and accessories available. Trusted Worldwide\u00a0\u2013 Trusted by watchmakers, repair professionals and watch enthusiasts worldwide. Personalized Sourcing\u00a0\u2013 Can\u2019t find the part you need? 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