---
description: Genuine Miyota JS20 second wheel for quartz chronograph. 6 o'clock subdial seconds component for movement repair. Japanese quality.
title: MIYOTA/CITIZEN JS20 Second Wheel - Sofly
image: https://www.soflypart.com/wp-content/uploads/2019/05/JS20S.jpg
---
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- **MIYOTA/CITIZEN JS20 Second Wheel**
[](https://www.soflypart.com/wp-content/uploads/2019/05/JS20S.jpg)
# MIYOTA/CITIZEN JS20 Second Wheel
$1.50
You Saved
| Brand | Choose an option MIYOTA- 
Clear |
| --- | --- |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $1.50 |
| 3 - 4 | 5% | $1.43 |
| 5 - 9 | 7% | $1.40 |
| 10 - 14 | 10% | $1.35 |
| 15+ | 15% | $1.28 |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $1.50 |
| 3 - 4 | 5% | $1.43 |
| 5 - 9 | 7% | $1.40 |
| 10 - 14 | 10% | $1.35 |
| 15+ | 15% | $1.28 |
MIYOTA/CITIZEN JS20 Second Wheel quantity
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## Product Description
The **MIYOTA/CITIZEN JS20 Second Wheel** is a genuine Japanese-made component for the popular JS20 quartz chronograph movement . As part of the gear train, this wheel drives the **chronograph seconds hand** located at the **6 o’clock subdial**, ensuring accurate elapsed time measurement . The JS20 is a 12½ ligne movement featuring a 30-minute chronograph function and a 24-hour indicator at 3 o’clock . This brand new original part is essential for watchmakers restoring proper chronograph function when the original component becomes worn or damaged.
## Features & Function
- **Genuine Miyota/Citizen part** – authentic Japanese-made component for the JS20 movement
- **Chronograph module component** – drives the stopwatch seconds hand at the 6 o’clock subdial for elapsed time measurement
- **0-jewel movement** – designed for the cost-effective JS20 quartz chronograph
- **Direct replacement** – drop-in replacement for worn or damaged chronograph second wheels
## Specifications
- **Compatible Movement**: MIYOTA/Citizen JS20
- **Movement Size**: 12½ ligne (approx. 28.0mm)
- **Movement Thickness**: 4.18mm
- **Chronograph Subdial Position**: 6 o’clock (chronograph seconds register), 9 o’clock (chronograph minute register), 3 o’clock (24-hour indicator)
- **Hand Hole Sizes**: 0.17mm (sweep seconds), 0.26mm (sub-hands)
- **Battery**: 364 / SR621SW
- **Jewels**: 0
- **Origin**: Japan
## Applications
- **Service and repair** – replacing worn or damaged chronograph second wheels in JS20 movements
- **Chronograph function restoration** – resolving issues with the 6 o’clock subdial seconds hand not resetting to zero or moving irregularly
- Suitable for **professional watchmakers** and **experienced repair technicians**
## FAQs
**1. Is this a genuine Miyota/Citizen part?**
Yes, this is a **genuine Miyota (Citizen) factory part** made in Japan. The JS20 is manufactured by Citizen’s Miyota movement division .
**2. Which movement is this second wheel compatible with?**
This second wheel is designed for the **Miyota JS20** quartz chronograph movement. The JS20 features a chronograph seconds register at 6 o’clock, chronograph minute register at 9 o’clock, and a 24-hour indicator at 3 o’clock .
**3. What is the function of the second wheel in the JS20?**
The second wheel drives the **chronograph seconds hand at the 6 o’clock subdial** for elapsed time measurement. The JS20 stopwatch can measure up to 29 minutes and 59 seconds .
## Why Choose SOFLY Watch Parts?
- Fast worldwide shipping within 3 business days.
- Competitive pricing on Seiko/Hattori calibers.
- 3,000+ watch movements and parts in stock.
- Trusted by watchmakers worldwide.
- Personalized sourcing support via **info@soflypart.com** or WhatsApp **+86 18620212114**.
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The JS20 is a 12\u00bd ligne movement featuring a 30-minute chronograph function and a 24-hour indicator at 3 o'clock\u00a0. This brand new original part is essential for watchmakers restoring proper chronograph function when the original component becomes worn or damaged. Features & Function Genuine Miyota/Citizen part\u00a0\u2013 authentic Japanese-made component for the JS20 movement\u00a0 Chronograph module component\u00a0\u2013 drives the stopwatch seconds hand at the 6 o'clock subdial for elapsed time measurement\u00a0 0-jewel movement\u00a0\u2013 designed for the cost-effective JS20 quartz chronograph\u00a0 Direct replacement\u00a0\u2013 drop-in replacement for worn or damaged chronograph second wheels Specifications Compatible Movement: MIYOTA/Citizen JS20\u00a0 Movement Size: 12\u00bd ligne (approx. 28.0mm)\u00a0 Movement Thickness: 4.18mm\u00a0 Chronograph Subdial Position: 6 o'clock (chronograph seconds register), 9 o'clock (chronograph minute register), 3 o'clock (24-hour indicator)\u00a0 Hand Hole Sizes: 0.17mm (sweep seconds), 0.26mm (sub-hands)\u00a0 Battery: 364 / SR621SW\u00a0 Jewels: 0\u00a0 Origin: Japan Applications Service and repair\u00a0\u2013 replacing worn or damaged chronograph second wheels in JS20 movements Chronograph function restoration\u00a0\u2013 resolving issues with the 6 o'clock subdial seconds hand not resetting to zero or moving irregularly\u00a0 Suitable for\u00a0professional watchmakers\u00a0and\u00a0experienced repair technicians FAQs 1. Is this a genuine Miyota/Citizen part? Yes, this is a\u00a0genuine Miyota (Citizen) factory part\u00a0made in Japan. The JS20 is manufactured by Citizen's Miyota movement division\u00a0. 2. Which movement is this second wheel compatible with? This second wheel is designed for the\u00a0Miyota JS20\u00a0quartz chronograph movement. The JS20 features a chronograph seconds register at 6 o'clock, chronograph minute register at 9 o'clock, and a 24-hour indicator at 3 o'clock\u00a0. 3. What is the function of the second wheel in the JS20? The second wheel drives the\u00a0chronograph seconds hand at the 6 o'clock subdial\u00a0for elapsed time measurement. The JS20 stopwatch can measure up to 29 minutes and 59 seconds\u00a0. Why Choose SOFLY Watch Parts? Fast worldwide shipping within 3 business days. Competitive pricing on Seiko/Hattori calibers. 3,000+ watch movements and parts in stock. Trusted by watchmakers worldwide. 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Features & Function Genuine Miyota/Citizen part\u00a0\u2013 authentic Japanese-made component for the JS20 movement\u00a0 Chronograph module component\u00a0\u2013 drives the stopwatch seconds hand at the 6 o'clock subdial for elapsed time measurement\u00a0 0-jewel movement\u00a0\u2013 designed for the cost-effective JS20 quartz chronograph\u00a0 Direct replacement\u00a0\u2013 drop-in replacement for worn or damaged chronograph second wheels Specifications Compatible Movement: MIYOTA/Citizen JS20\u00a0 Movement Size: 12\u00bd ligne (approx. 28.0mm)\u00a0 Movement Thickness: 4.18mm\u00a0 Chronograph Subdial Position: 6 o'clock (chronograph seconds register), 9 o'clock (chronograph minute register), 3 o'clock (24-hour indicator)\u00a0 Hand Hole Sizes: 0.17mm (sweep seconds), 0.26mm (sub-hands)\u00a0 Battery: 364 / SR621SW\u00a0 Jewels: 0\u00a0 Origin: Japan Applications Service and repair\u00a0\u2013 replacing worn or damaged chronograph second wheels in JS20 movements Chronograph function restoration\u00a0\u2013 resolving issues with the 6 o'clock subdial seconds hand not resetting to zero or moving irregularly\u00a0 Suitable for\u00a0professional watchmakers\u00a0and\u00a0experienced repair technicians FAQs 1. 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