---
description: Genuine ETA 7750-201 great wheel for Valjoux 7750. Swiss-made first wheel in gear train for automatic chronograph movement repair.
title: ETA 7750 Movement Great Wheel 201 | ETA Movement Parts - Sofly
image: https://www.soflypart.com/wp-content/uploads/2019/06/7750gw.jpg
---
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- **ETA 7750-201 Great Wheel**
[](https://www.soflypart.com/wp-content/uploads/2019/06/7750gw.jpg)
[](https://www.soflypart.com/wp-content/uploads/2019/06/7750gwb.jpg)
# ETA 7750-201 Great Wheel
$18.00
You Saved
| Brand | Choose an option ETA- 
Clear |
| --- | --- |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $18.00 |
| 3 - 4 | 5% | $17.10 |
| 5 - 9 | 7% | $16.74 |
| 10 - 14 | 10% | $16.20 |
| 15+ | 15% | $15.30 |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $18.00 |
| 3 - 4 | 5% | $17.10 |
| 5 - 9 | 7% | $16.74 |
| 10 - 14 | 10% | $16.20 |
| 15+ | 15% | $15.30 |
ETA 7750-201 Great Wheel quantity
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## Product Description
The **ETA 7750-201 Great Wheel** is a genuine Swiss-made component for the ETA/Valjoux 7750 automatic chronograph movement. As the **first wheel in the gear train**, the great wheel is mounted on the mainspring barrel and is responsible for transmitting power from the mainspring to the rest of the gear train, ensuring consistent energy delivery to the center wheel and ultimately the escapement. This brand new original part is essential for watchmakers restoring proper power transmission and timekeeping accuracy when the original great wheel becomes worn or damaged.
## Features & Function
- **Genuine ETA/Valjoux part** – authentic Swiss-made component for the ETA 7750 movement
- **First wheel in the gear train** – mounted on the mainspring barrel for primary power transmission
- **Critical for power delivery** – ensures consistent energy flow to the center wheel and escapement
- **Direct replacement** – drop-in replacement for worn or damaged great wheels
- **Precision-engineered** – manufactured to ETA’s original specifications
## Specifications
- **Part Number**: 7750-201
- **Compatible Movements**: ETA/Valjoux 7750, 7751, 7753, 7754, 7760, 7765
- **Function**: First wheel in the gear train (mainspring barrel drive)
- **Movement Diameter**: 30.0 mm
- **Movement Height**: 7.9 mm
- **Jewels**: 25
- **Frequency**: 28,800 vph (4 Hz)
- **Power Reserve**: 42–48 hours
- **Origin**: Switzerland (ETA factory part)
- **Condition**: Brand new
## Applications
- **Service and overhaul** of ETA 7750-series movements
- **Gear train repair** – replacing worn or damaged great wheels
- **Power transmission restoration** – ensuring stable energy flow to the escapement
- Suitable for **professional watchmakers** and **experienced repair technicians**
## FAQs
**1. Is this a genuine ETA part?**
Yes, this is a **genuine ETA factory part** (reference 7750-201), made in Switzerland. It is not an aftermarket or generic copy.
**2. Which movements is this great wheel compatible with?**
This great wheel is compatible with the **ETA/Valjoux 7750** and its variants, including 7751, 7753, 7754, 7760, and 7765.
**3. What is the function of the great wheel?**
The great wheel is the **first wheel in the gear train**, mounted on the mainspring barrel. It transmits power from the mainspring to the center wheel, ensuring consistent energy delivery to the escapement for stable timekeeping.
## 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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As the\u00a0first wheel in the gear train, the great wheel is mounted on the mainspring barrel and is responsible for transmitting power from the mainspring to the rest of the gear train, ensuring consistent energy delivery to the center wheel and ultimately the escapement. This brand new original part is essential for watchmakers restoring proper power transmission and timekeeping accuracy when the original great wheel becomes worn or damaged. Features & Function Genuine ETA/Valjoux part\u00a0\u2013 authentic Swiss-made component for the ETA 7750 movement First wheel in the gear train\u00a0\u2013 mounted on the mainspring barrel for primary power transmission Critical for power delivery\u00a0\u2013 ensures consistent energy flow to the center wheel and escapement Direct replacement\u00a0\u2013 drop-in replacement for worn or damaged great wheels Precision-engineered\u00a0\u2013 manufactured to ETA's original specifications Specifications Part Number: 7750-201 Compatible Movements: ETA/Valjoux 7750, 7751, 7753, 7754, 7760, 7765 Function: First wheel in the gear train (mainspring barrel drive) Movement Diameter: 30.0 mm Movement Height: 7.9 mm Jewels: 25 Frequency: 28,800 vph (4 Hz) Power Reserve: 42\u201348 hours Origin: Switzerland (ETA factory part) Condition: Brand new Applications Service and overhaul\u00a0of ETA 7750-series movements Gear train repair\u00a0\u2013 replacing worn or damaged great wheels Power transmission restoration\u00a0\u2013 ensuring stable energy flow to the escapement Suitable for\u00a0professional watchmakers\u00a0and\u00a0experienced repair technicians FAQs 1. 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