---
description: ETA 7750-8171 Chronograph Cam — Genuine ETA, fits 7750 chronograph movement. Original factory cam. Made in Switzerland. Brand new.
title: ETA 7750-8171 Chronograph Cam - Sofly
image: https://www.soflypart.com/wp-content/uploads/2020/07/DSC05657.jpg
---
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- **ETA 7750-8171 Chronograph Cam**
[](https://www.soflypart.com/wp-content/uploads/2020/07/DSC05657.jpg)
# ETA 7750-8171 Chronograph Cam
$10.00
You Saved
| Brand | Choose an option ETA- 
Clear |
| --- | --- |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $10.00 |
| 3 - 4 | 5% | $9.50 |
| 5 - 9 | 7% | $9.30 |
| 10 - 14 | 10% | $9.00 |
| 15+ | 15% | $8.50 |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $10.00 |
| 3 - 4 | 5% | $9.50 |
| 5 - 9 | 7% | $9.30 |
| 10 - 14 | 10% | $9.00 |
| 15+ | 15% | $8.50 |
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## Product Description
**Genuine ETA 7750-8171 Chronograph Cam**, Made in Switzerland, brand new — the **original factory heart-shaped cam** for the **ETA/Valjoux 7750 chronograph movement’s reset mechanism**. Precisely engineered with a **precise curved cam profile that drives the reset hammers outward** when the chronograph reset is activated, the Chronograph Cam **coordinates the entire reset sequence** and **ensures all chronograph hands return precisely to zero**. An **essential replacement part** for restoring a worn or damaged cam during movement service. **Original ETA part** — the professional’s choice for genuine chronograph reset restoration.
## Features & Function
- **Genuine ETA 7750-8171** — original Swiss-made factory part, brand new, authentic, part number 7750-8171
- **Chronograph cam** — heart-shaped cam with precise curved profile that drives reset hammer motion during reset
- **Reset sequence coordination** — controls the timing and force of all reset hammers to ensure simultaneous zero return
- **Cam-driven reset** — the curved cam surface translates pusher input into precisely coordinated hammer motion
- **Original factory quality** — exact cam profile geometry and dimensional specifications for perfect fit in the ETA/Valjoux 7750 movement
## Specifications
| Parameter | Value |
| --- | --- |
| **Brand** | ETA (Swatch Group) |
| **Part Number** | 7750-8171 |
| **Component** | Chronograph Cam |
| **Compatibility** | ETA/Valjoux 7750 Chronograph Movement |
| **Origin** | Made in Switzerland |
| **Type** | Original Factory Part (Genuine ETA) |
| **Function** | Heart-shaped cam; drives reset hammers outward during reset; coordinates chronograph hand return to zero |
| **Packing** | Original Packing |
| **Condition** | Brand New / Genuine ETA |
## Applications
- Replacement of worn, damaged, or stripped Chronograph Cam in the ETA/Valjoux 7750 movement
- Repair of chronograph reset failures: chronograph hands not returning to zero, uneven reset, or reset jamming
- Repair of cam profile wear: worn cam surface causing weak or inconsistent reset force
- Repair of reset sequence issues: reset hammers not deploying properly due to cam malfunction
- Professional movement service, overhaul, and chronograph restoration
## FAQ
**Q1: Is this a genuine ETA part?**
A: Yes — this is a **genuine ETA 7750-8171 Chronograph Cam**, **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 7750-8171** is the specific **Chronograph Cam** 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 Chronograph Cam do?**
A: The **Chronograph Cam (7750-8171)** is the **heart of the chronograph reset mechanism** — it is the **heart-shaped rotating cam** that **coordinates the entire reset sequence**. When you press the **reset pusher**, a reset lever pushes against the cam’s curved profile, causing it to **rotate**. As the cam rotates, its **precisely machined surface pushes the reset hammers outward**, which in turn push the **chronograph seconds, minute counter, and hour counter hands back to zero simultaneously**. The cam’s **specific profile** determines the **exact timing, sequence, and force** of the reset. Without a functioning cam, the reset hammers have **no driving force**, and the chronograph hands **cannot return to zero**.
## 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 with a\u00a0precise curved cam profile that drives the reset hammers outward\u00a0when the chronograph reset is activated, the Chronograph Cam\u00a0coordinates the entire reset sequence\u00a0and\u00a0ensures all chronograph hands return precisely to zero. An\u00a0essential replacement part\u00a0for restoring a worn or damaged cam during movement service.\u00a0Original ETA part\u00a0\u2014 the professional\u2019s choice for genuine chronograph reset restoration. Features & Function Genuine ETA 7750-8171\u00a0\u2014 original Swiss-made factory part, brand new, authentic, part number 7750-8171 Chronograph cam\u00a0\u2014 heart-shaped cam with precise curved profile that drives reset hammer motion during reset Reset sequence coordination\u00a0\u2014 controls the timing and force of all reset hammers to ensure simultaneous zero return Cam-driven reset\u00a0\u2014 the curved cam surface translates pusher input into precisely coordinated hammer motion Original factory quality\u00a0\u2014 exact cam profile geometry and dimensional specifications for perfect fit in the ETA/Valjoux 7750 movement Specifications Parameter Value Brand ETA (Swatch Group) Part Number 7750-8171 Component Chronograph Cam Compatibility ETA/Valjoux 7750 Chronograph Movement Origin Made in Switzerland Type Original Factory Part (Genuine ETA) Function Heart-shaped cam; drives reset hammers outward during reset; coordinates chronograph hand return to zero Packing Original Packing Condition Brand New / Genuine ETA Applications Replacement of worn, damaged, or stripped Chronograph Cam in the ETA/Valjoux 7750 movement Repair of chronograph reset failures: chronograph hands not returning to zero, uneven reset, or reset jamming Repair of cam profile wear: worn cam surface causing weak or inconsistent reset force Repair of reset sequence issues: reset hammers not deploying properly due to cam malfunction Professional movement service, overhaul, and chronograph restoration FAQ Q1: Is this a genuine ETA part? A: Yes \u2014 this is a\u00a0genuine ETA 7750-8171 Chronograph Cam,\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 7750-8171\u00a0is the specific\u00a0Chronograph Cam\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 Chronograph Cam do? A: The\u00a0Chronograph Cam (7750-8171)\u00a0is the\u00a0heart of the chronograph reset mechanism\u00a0\u2014 it is the\u00a0heart-shaped rotating cam\u00a0that\u00a0coordinates the entire reset sequence. When you press the\u00a0reset pusher, a reset lever pushes against the cam\u2019s curved profile, causing it to\u00a0rotate. As the cam rotates, its\u00a0precisely machined surface pushes the reset hammers outward, which in turn push the\u00a0chronograph seconds, minute counter, and hour counter hands back to zero simultaneously. The cam\u2019s\u00a0specific profile\u00a0determines the\u00a0exact timing, sequence, and force\u00a0of the reset. Without a functioning cam, the reset hammers have\u00a0no driving force, and the chronograph hands\u00a0cannot return to zero. 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/DSC05657-150x150.jpg","offers":{"@type":"Offer","description":"Product Description Genuine ETA 7750-8171 Chronograph Cam, Made in Switzerland, brand new \u2014 the\u00a0original factory heart-shaped cam\u00a0for the\u00a0ETA/Valjoux 7750 chronograph movement\u2019s reset mechanism. Precisely engineered with a\u00a0precise curved cam profile that drives the reset hammers outward\u00a0when the chronograph reset is activated, the Chronograph Cam\u00a0coordinates the entire reset sequence\u00a0and\u00a0ensures all chronograph hands return precisely to zero. An\u00a0essential replacement part\u00a0for restoring a worn or damaged cam during movement service.\u00a0Original ETA part\u00a0\u2014 the professional\u2019s choice for genuine chronograph reset restoration. Features & Function Genuine ETA 7750-8171\u00a0\u2014 original Swiss-made factory part, brand new, authentic, part number 7750-8171 Chronograph cam\u00a0\u2014 heart-shaped cam with precise curved profile that drives reset hammer motion during reset Reset sequence coordination\u00a0\u2014 controls the timing and force of all reset hammers to ensure simultaneous zero return Cam-driven reset\u00a0\u2014 the curved cam surface translates pusher input into precisely coordinated hammer motion Original factory quality\u00a0\u2014 exact cam profile geometry and dimensional specifications for perfect fit in the ETA/Valjoux 7750 movement Specifications Parameter Value Brand ETA (Swatch Group) Part Number 7750-8171 Component Chronograph Cam Compatibility ETA/Valjoux 7750 Chronograph Movement Origin Made in Switzerland Type Original Factory Part (Genuine ETA) Function Heart-shaped cam; drives reset hammers outward during reset; coordinates chronograph hand return to zero Packing Original Packing Condition Brand New / Genuine ETA Applications Replacement of worn, damaged, or stripped Chronograph Cam in the ETA/Valjoux 7750 movement Repair of chronograph reset failures: chronograph hands not returning to zero, uneven reset, or reset jamming Repair of cam profile wear: worn cam surface causing weak or inconsistent reset force Repair of reset sequence issues: reset hammers not deploying properly due to cam malfunction Professional movement service, overhaul, and chronograph restoration FAQ Q1: Is this a genuine ETA part? A: Yes \u2014 this is a\u00a0genuine ETA 7750-8171 Chronograph Cam,\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 7750-8171\u00a0is the specific\u00a0Chronograph Cam\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 Chronograph Cam do? A: The\u00a0Chronograph Cam (7750-8171)\u00a0is the\u00a0heart of the chronograph reset mechanism\u00a0\u2014 it is the\u00a0heart-shaped rotating cam\u00a0that\u00a0coordinates the entire reset sequence. When you press the\u00a0reset pusher, a reset lever pushes against the cam\u2019s curved profile, causing it to\u00a0rotate. As the cam rotates, its\u00a0precisely machined surface pushes the reset hammers outward, which in turn push the\u00a0chronograph seconds, minute counter, and hour counter hands back to zero simultaneously. The cam\u2019s\u00a0specific profile\u00a0determines the\u00a0exact timing, sequence, and force\u00a0of the reset. Without a functioning cam, the reset hammers have\u00a0no driving force, and the chronograph hands\u00a0cannot return to zero. 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":"10","priceCurrency":"USD","availability":"http://schema.org/InStock","itemCondition":"NewCondition","priceValidUntil":"2027-12-31","url":"https://www.soflypart.com/product/eta-7750-8171-chronograph-cam/?attribute_pa_brand=eta"}}],"@id":"https://www.soflypart.com/product/eta-7750-8171-chronograph-cam/#richSnippet"}]}
```