---
description: Sofly is a family owned business in China. Our company has committed itself to provide a wide range of affordable watch parts globally.
title: ETA 7750-9433 Stop Lever - Sofly
image: https://www.soflypart.com/wp-content/uploads/2020/07/DSC05651.jpg
---
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- **ETA 7750-9433 Stop Lever**
[](https://www.soflypart.com/wp-content/uploads/2020/07/DSC05651.jpg)
# ETA 7750-9433 Stop Lever
$3.00
You Saved
| Brand | Choose an option ETA- 
Clear |
| --- | --- |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $3.00 |
| 3 - 4 | 5% | $2.85 |
| 5 - 9 | 7% | $2.79 |
| 10 - 14 | 10% | $2.70 |
| 15+ | 15% | $2.55 |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $3.00 |
| 3 - 4 | 5% | $2.85 |
| 5 - 9 | 7% | $2.79 |
| 10 - 14 | 10% | $2.70 |
| 15+ | 15% | $2.55 |
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## Product Description
**Genuine ETA 7750-9433 Stop Lever**, Made in Switzerland, brand new — the **original factory balance-stopping lever** for the **ETA/Valjoux 7750 chronograph movement’s hacking seconds mechanism**. Precisely engineered to **engage with the balance wheel and halt its oscillation when the crown is pulled out to the time-setting position**, the Stop Lever **enables precise time synchronization** and **prevents mainspring overwinding during setting**. An **essential replacement part** for restoring a worn or damaged stop lever during movement service. **Original ETA part** — the professional’s choice for genuine hacking mechanism restoration.
## Features & Function
- **Genuine ETA 7750-9433** — original Swiss-made factory part, brand new, authentic, part number 7750-9433
- **Stop lever** — balance-stopping lever that halts the balance wheel when crown is pulled out to the time-setting position
- **Precise time synchronization** — allows the watch to be synchronized with an official time signal by stopping and restarting at exact seconds
- **Overwinding protection** — prevents mainspring from continuing to wind during time-setting to protect the mainspring
- **Original factory quality** — exact lever geometry and engagement specifications for perfect fit in the ETA/Valjoux 7750 movement
## Specifications
| Parameter | Value |
| --- | --- |
| **Brand** | ETA (Swatch Group) |
| **Part Number** | 7750-9433 |
| **Component** | Stop Lever |
| **Compatibility** | ETA/Valjoux 7750 Chronograph Movement |
| **Origin** | Made in Switzerland |
| **Type** | Original Factory Part (Genuine ETA) |
| **Function** | Balance-stopping lever; halts balance wheel during time-setting; enables precise time synchronization and prevents overwinding |
| **Packing** | Original Packing |
| **Condition** | Brand New / Genuine ETA |
## Applications
- Replacement of worn, fatigued, or damaged Stop Lever in the ETA/Valjoux 7750 movement
- Repair of hacking mechanism failures: balance wheel not stopping when crown is pulled out
- Repair of time-setting synchronization issues: seconds not stopping for precise synchronization
- Repair of overwinding protection failures: mainspring continuing to wind during time-setting
- Professional movement service, overhaul, and chronograph restoration
## FAQ
**Q1: Is this a genuine ETA part?**
A: Yes — this is a **genuine ETA 7750-9433 Stop Lever**, **Made in Switzerland**, brand new. It is an **original factory part** from ETA (Swatch Group), the world’s leading movement manufacturer. Not a generic or replica part.
**Q2: How do I confirm this part fits my movement?**
A: Confirm your movement is an **ETA/Valjoux 7750 chronograph**. The **part number 7750-9433** is the specific **Stop Lever** for this movement. Common brand applications include: **IWC Portugieser Chronograph, Omega Speedmaster (older 7750 variant), Tag Heuer Monaco, Breitling Navitimer**, and many other chronographs using the Valjoux/ETA 7750 platform.
**Q3: What does the Stop Lever do?**
A: The **Stop Lever (7750-9433)** is the **balance-stopping component** of the **hacking seconds mechanism**. When the **crown is pulled out to the time-setting position (Position 2)**, the setting lever moves and **engages the stop lever**, which in turn **physically contacts the balance wheel** and **halts its oscillation**. This serves **two purposes**: **(1) Precise time synchronization** — by stopping the balance, the seconds hand stops at zero, allowing you to **synchronize the watch exactly with an official time signal** (e.g., a radio time signal). This is especially important for **military and pilot watches**. **(2) Overwinding protection** — by stopping the balance, the entire gear train stops, **preventing the mainspring from continuing to wind** while the crown is being used for time-setting. Without a functioning stop lever, the balance **keeps running** when the crown is pulled, making **precise synchronization impossible** and risking **mainspring overwinding**.
## 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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Precisely engineered to\u00a0engage with the balance wheel and halt its oscillation when the crown is pulled out to the time-setting position, the Stop Lever\u00a0enables precise time synchronization\u00a0and\u00a0prevents mainspring overwinding during setting. An\u00a0essential replacement part\u00a0for restoring a worn or damaged stop lever during movement service.\u00a0Original ETA part\u00a0\u2014 the professional\u2019s choice for genuine hacking mechanism restoration. Features & Function Genuine ETA 7750-9433\u00a0\u2014 original Swiss-made factory part, brand new, authentic, part number 7750-9433 Stop lever\u00a0\u2014 balance-stopping lever that halts the balance wheel when crown is pulled out to the time-setting position Precise time synchronization\u00a0\u2014 allows the watch to be synchronized with an official time signal by stopping and restarting at exact seconds Overwinding protection\u00a0\u2014 prevents mainspring from continuing to wind during time-setting to protect the mainspring Original factory quality\u00a0\u2014 exact lever geometry and engagement specifications for perfect fit in the ETA/Valjoux 7750 movement Specifications Parameter Value Brand ETA (Swatch Group) Part Number 7750-9433 Component Stop Lever Compatibility ETA/Valjoux 7750 Chronograph Movement Origin Made in Switzerland Type Original Factory Part (Genuine ETA) Function Balance-stopping lever; halts balance wheel during time-setting; enables precise time synchronization and prevents overwinding Packing Original Packing Condition Brand New / Genuine ETA Applications Replacement of worn, fatigued, or damaged Stop Lever in the ETA/Valjoux 7750 movement Repair of hacking mechanism failures: balance wheel not stopping when crown is pulled out Repair of time-setting synchronization issues: seconds not stopping for precise synchronization Repair of overwinding protection failures: mainspring continuing to wind during time-setting Professional movement service, overhaul, and chronograph restoration FAQ Q1: Is this a genuine ETA part? A: Yes \u2014 this is a\u00a0genuine ETA 7750-9433 Stop Lever,\u00a0Made in Switzerland, brand new. It is an\u00a0original factory part\u00a0from ETA (Swatch Group), the world\u2019s leading movement manufacturer. Not a generic or replica part. Q2: How do I confirm this part fits my movement? A: Confirm your movement is an\u00a0ETA/Valjoux 7750 chronograph. The\u00a0part number 7750-9433\u00a0is the specific\u00a0Stop Lever\u00a0for this movement. Common brand applications include:\u00a0IWC Portugieser Chronograph, Omega Speedmaster (older 7750 variant), Tag Heuer Monaco, Breitling Navitimer, and many other chronographs using the Valjoux/ETA 7750 platform. Q3: What does the Stop Lever do? A: The\u00a0Stop Lever (7750-9433)\u00a0is the\u00a0balance-stopping component\u00a0of the\u00a0hacking seconds mechanism. When the\u00a0crown is pulled out to the time-setting position (Position 2), the setting lever moves and\u00a0engages the stop lever, which in turn\u00a0physically contacts the balance wheel\u00a0and\u00a0halts its oscillation. This serves\u00a0two purposes:\u00a0(1) Precise time synchronization\u00a0\u2014 by stopping the balance, the seconds hand stops at zero, allowing you to\u00a0synchronize the watch exactly with an official time signal\u00a0(e.g., a radio time signal). This is especially important for\u00a0military and pilot watches.\u00a0(2) Overwinding protection\u00a0\u2014 by stopping the balance, the entire gear train stops,\u00a0preventing the mainspring from continuing to wind\u00a0while the crown is being used for time-setting. Without a functioning stop lever, the balance\u00a0keeps running\u00a0when the crown is pulled, making\u00a0precise synchronization impossible\u00a0and risking\u00a0mainspring overwinding. 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\u00a0info@soflypart.com\u00a0or WhatsApp\u00a0+86 18620212114.","image":"https://www.soflypart.com/wp-content/uploads/2020/07/DSC05651-150x150.jpg","offers":{"@type":"Offer","description":"Product Description Genuine ETA 7750-9433 Stop Lever, Made in Switzerland, brand new \u2014 the\u00a0original factory balance-stopping lever\u00a0for the\u00a0ETA/Valjoux 7750 chronograph movement\u2019s hacking seconds mechanism. Precisely engineered to\u00a0engage with the balance wheel and halt its oscillation when the crown is pulled out to the time-setting position, the Stop Lever\u00a0enables precise time synchronization\u00a0and\u00a0prevents mainspring overwinding during setting. An\u00a0essential replacement part\u00a0for restoring a worn or damaged stop lever during movement service.\u00a0Original ETA part\u00a0\u2014 the professional\u2019s choice for genuine hacking mechanism restoration. Features & Function Genuine ETA 7750-9433\u00a0\u2014 original Swiss-made factory part, brand new, authentic, part number 7750-9433 Stop lever\u00a0\u2014 balance-stopping lever that halts the balance wheel when crown is pulled out to the time-setting position Precise time synchronization\u00a0\u2014 allows the watch to be synchronized with an official time signal by stopping and restarting at exact seconds Overwinding protection\u00a0\u2014 prevents mainspring from continuing to wind during time-setting to protect the mainspring Original factory quality\u00a0\u2014 exact lever geometry and engagement specifications for perfect fit in the ETA/Valjoux 7750 movement Specifications Parameter Value Brand ETA (Swatch Group) Part Number 7750-9433 Component Stop Lever Compatibility ETA/Valjoux 7750 Chronograph Movement Origin Made in Switzerland Type Original Factory Part (Genuine ETA) Function Balance-stopping lever; halts balance wheel during time-setting; enables precise time synchronization and prevents overwinding Packing Original Packing Condition Brand New / Genuine ETA Applications Replacement of worn, fatigued, or damaged Stop Lever in the ETA/Valjoux 7750 movement Repair of hacking mechanism failures: balance wheel not stopping when crown is pulled out Repair of time-setting synchronization issues: seconds not stopping for precise synchronization Repair of overwinding protection failures: mainspring continuing to wind during time-setting Professional movement service, overhaul, and chronograph restoration FAQ Q1: Is this a genuine ETA part? A: Yes \u2014 this is a\u00a0genuine ETA 7750-9433 Stop Lever,\u00a0Made in Switzerland, brand new. It is an\u00a0original factory part\u00a0from ETA (Swatch Group), the world\u2019s leading movement manufacturer. Not a generic or replica part. Q2: How do I confirm this part fits my movement? A: Confirm your movement is an\u00a0ETA/Valjoux 7750 chronograph. The\u00a0part number 7750-9433\u00a0is the specific\u00a0Stop Lever\u00a0for this movement. Common brand applications include:\u00a0IWC Portugieser Chronograph, Omega Speedmaster (older 7750 variant), Tag Heuer Monaco, Breitling Navitimer, and many other chronographs using the Valjoux/ETA 7750 platform. Q3: What does the Stop Lever do? A: The\u00a0Stop Lever (7750-9433)\u00a0is the\u00a0balance-stopping component\u00a0of the\u00a0hacking seconds mechanism. When the\u00a0crown is pulled out to the time-setting position (Position 2), the setting lever moves and\u00a0engages the stop lever, which in turn\u00a0physically contacts the balance wheel\u00a0and\u00a0halts its oscillation. This serves\u00a0two purposes:\u00a0(1) Precise time synchronization\u00a0\u2014 by stopping the balance, the seconds hand stops at zero, allowing you to\u00a0synchronize the watch exactly with an official time signal\u00a0(e.g., a radio time signal). This is especially important for\u00a0military and pilot watches.\u00a0(2) Overwinding protection\u00a0\u2014 by stopping the balance, the entire gear train stops,\u00a0preventing the mainspring from continuing to wind\u00a0while the crown is being used for time-setting. Without a functioning stop lever, the balance\u00a0keeps running\u00a0when the crown is pulled, making\u00a0precise synchronization impossible\u00a0and risking\u00a0mainspring overwinding. 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\u00a0info@soflypart.com\u00a0or WhatsApp\u00a0+86 18620212114.","price":"3","priceCurrency":"USD","availability":"http://schema.org/InStock","itemCondition":"NewCondition","priceValidUntil":"2027-12-31","url":"https://www.soflypart.com/product/eta-7750-9433-stop-lever/?attribute_pa_brand=eta"}}],"@id":"https://www.soflypart.com/product/eta-7750-9433-stop-lever/#richSnippet"}]}
```