---
description: ETA 7750-8690 Hour Counter Lock — Genuine ETA, fits 7750 chronograph movement. Original factory counter lock part. Made in Switzerland. Brand new.
title: ETA 7750-8690 Hour Counter Lock - Sofly
image: https://www.soflypart.com/wp-content/uploads/2020/07/DSC05661.jpg
---
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- **ETA 7750-8690 Hour Counter Lock**
[](https://www.soflypart.com/wp-content/uploads/2020/07/DSC05661.jpg)
# ETA 7750-8690 Hour Counter Lock
$6.00
You Saved
| Brand | Choose an option ETA- 
Clear |
| --- | --- |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $6.00 |
| 3 - 4 | 5% | $5.70 |
| 5 - 9 | 7% | $5.58 |
| 10 - 14 | 10% | $5.40 |
| 15+ | 15% | $5.10 |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $6.00 |
| 3 - 4 | 5% | $5.70 |
| 5 - 9 | 7% | $5.58 |
| 10 - 14 | 10% | $5.40 |
| 15+ | 15% | $5.10 |
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## Product Description
**Genuine ETA 7750-8690 Hour Counter Lock**, Made in Switzerland, brand new — the **original factory locking component** for the **ETA/Valjoux 7750 chronograph movement’s 12-hour counter mechanism**. Precisely engineered to **physically lock the hour counter in precise positions during chronograph operation and reset**, the Hour Counter Lock **ensures reliable 12-hour counter advancement** and **prevents counter drift** during chronograph timing. An **essential replacement part** for restoring a worn or damaged hour counter lock during movement service. **Original ETA part** — the professional’s choice for genuine chronograph counter mechanism restoration.
## Features & Function
- **Genuine ETA 7750-8690** — original Swiss-made factory part, brand new, authentic, part number 7750-8690
- **Hour counter lock** — physically locks the 12-hour counter in precise positions during chronograph operation
- **Counter advancement support** — ensures reliable 12-hour counter progression each time the minute counter completes its cycle
- **Drift prevention** — prevents unwanted counter movement or drift during chronograph timing and reset sequences
- **Original factory quality** — exact locking geometry and dimensional specifications for perfect fit in the ETA/Valjoux 7750 movement
## Specifications
| Parameter | Value |
| --- | --- |
| **Brand** | ETA (Swatch Group) |
| **Part Number** | 7750-8690 |
| **Component** | Hour Counter Lock |
| **Compatibility** | ETA/Valjoux 7750 Chronograph Movement |
| **Origin** | Made in Switzerland |
| **Type** | Original Factory Part (Genuine ETA) |
| **Function** | Physically locks 12-hour counter in precise positions; ensures reliable counter advancement and prevents drift during chronograph operation |
| **Packing** | Original Packing |
| **Condition** | Brand New / Genuine ETA |
## Applications
- Replacement of worn, damaged, or stripped Hour Counter Lock in the ETA/Valjoux 7750 movement
- Repair of 12-hour counter failures: counter not locking properly, counter advancing incorrectly, or counter drift
- Repair of chronograph counter mechanism: hour counter locking failure or reset sequence malfunction
- Professional movement service, overhaul, and chronograph restoration
- Certified watchmaker and service center parts supply
## FAQ
**Q1: Is this a genuine ETA part?**
A: Yes — this is a **genuine ETA 7750-8690 Hour Counter Lock**, **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 7750-8690** is the specific **Hour Counter Lock** for the 12-hour counter mechanism in 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 Hour Counter Lock do?**
A: The **Hour Counter Lock (7750-8690)** is the **locking mechanism for the chronograph’s 12-hour counter**. The 7750 chronograph has **three registers**: the central seconds hand, the 30-minute counter at 12 o’clock, and the **12-hour counter** (typically at 6 o’clock). The 12-hour counter advances **one position every 30 minutes** of chronograph running. The **Hour Counter Lock** ensures that the **12-hour counter gear is locked in precise positions** during chronograph operation — without locking, the counter could **drift or advance incorrectly**. During the chronograph **reset sequence**, the lock also coordinates with the reset hammers to **release the counter** for correct 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 to\u00a0physically lock the hour counter in precise positions during chronograph operation and reset, the Hour Counter Lock\u00a0ensures reliable 12-hour counter advancement\u00a0and\u00a0prevents counter drift\u00a0during chronograph timing. An\u00a0essential replacement part\u00a0for restoring a worn or damaged hour counter lock during movement service.\u00a0Original ETA part\u00a0\u2014 the professional\u2019s choice for genuine chronograph counter mechanism restoration. Features & Function Genuine ETA 7750-8690\u00a0\u2014 original Swiss-made factory part, brand new, authentic, part number 7750-8690 Hour counter lock\u00a0\u2014 physically locks the 12-hour counter in precise positions during chronograph operation Counter advancement support\u00a0\u2014 ensures reliable 12-hour counter progression each time the minute counter completes its cycle Drift prevention\u00a0\u2014 prevents unwanted counter movement or drift during chronograph timing and reset sequences Original factory quality\u00a0\u2014 exact locking geometry and dimensional specifications for perfect fit in the ETA/Valjoux 7750 movement Specifications Parameter Value Brand ETA (Swatch Group) Part Number 7750-8690 Component Hour Counter Lock Compatibility ETA/Valjoux 7750 Chronograph Movement Origin Made in Switzerland Type Original Factory Part (Genuine ETA) Function Physically locks 12-hour counter in precise positions; ensures reliable counter advancement and prevents drift during chronograph operation Packing Original Packing Condition Brand New / Genuine ETA Applications Replacement of worn, damaged, or stripped Hour Counter Lock in the ETA/Valjoux 7750 movement Repair of 12-hour counter failures: counter not locking properly, counter advancing incorrectly, or counter drift Repair of chronograph counter mechanism: hour counter locking failure or reset sequence malfunction Professional movement service, overhaul, and chronograph restoration Certified watchmaker and service center parts supply FAQ Q1: Is this a genuine ETA part? A: Yes \u2014 this is a\u00a0genuine ETA 7750-8690 Hour Counter Lock,\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 7750-8690\u00a0is the specific\u00a0Hour Counter Lock\u00a0for the 12-hour counter mechanism in 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 Hour Counter Lock do? A: The\u00a0Hour Counter Lock (7750-8690)\u00a0is the\u00a0locking mechanism for the chronograph\u2019s 12-hour counter. The 7750 chronograph has\u00a0three registers: the central seconds hand, the 30-minute counter at 12 o\u2019clock, and the\u00a012-hour counter\u00a0(typically at 6 o\u2019clock). The 12-hour counter advances\u00a0one position every 30 minutes\u00a0of chronograph running. The\u00a0Hour Counter Lock\u00a0ensures that the\u00a012-hour counter gear is locked in precise positions\u00a0during chronograph operation \u2014 without locking, the counter could\u00a0drift or advance incorrectly. During the chronograph\u00a0reset sequence, the lock also coordinates with the reset hammers to\u00a0release the counter\u00a0for correct 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/DSC05661-150x150.jpg","offers":{"@type":"Offer","description":"Product Description Genuine ETA 7750-8690 Hour Counter Lock, Made in Switzerland, brand new \u2014 the\u00a0original factory locking component\u00a0for the\u00a0ETA/Valjoux 7750 chronograph movement\u2019s 12-hour counter mechanism. Precisely engineered to\u00a0physically lock the hour counter in precise positions during chronograph operation and reset, the Hour Counter Lock\u00a0ensures reliable 12-hour counter advancement\u00a0and\u00a0prevents counter drift\u00a0during chronograph timing. An\u00a0essential replacement part\u00a0for restoring a worn or damaged hour counter lock during movement service.\u00a0Original ETA part\u00a0\u2014 the professional\u2019s choice for genuine chronograph counter mechanism restoration. Features & Function Genuine ETA 7750-8690\u00a0\u2014 original Swiss-made factory part, brand new, authentic, part number 7750-8690 Hour counter lock\u00a0\u2014 physically locks the 12-hour counter in precise positions during chronograph operation Counter advancement support\u00a0\u2014 ensures reliable 12-hour counter progression each time the minute counter completes its cycle Drift prevention\u00a0\u2014 prevents unwanted counter movement or drift during chronograph timing and reset sequences Original factory quality\u00a0\u2014 exact locking geometry and dimensional specifications for perfect fit in the ETA/Valjoux 7750 movement Specifications Parameter Value Brand ETA (Swatch Group) Part Number 7750-8690 Component Hour Counter Lock Compatibility ETA/Valjoux 7750 Chronograph Movement Origin Made in Switzerland Type Original Factory Part (Genuine ETA) Function Physically locks 12-hour counter in precise positions; ensures reliable counter advancement and prevents drift during chronograph operation Packing Original Packing Condition Brand New / Genuine ETA Applications Replacement of worn, damaged, or stripped Hour Counter Lock in the ETA/Valjoux 7750 movement Repair of 12-hour counter failures: counter not locking properly, counter advancing incorrectly, or counter drift Repair of chronograph counter mechanism: hour counter locking failure or reset sequence malfunction Professional movement service, overhaul, and chronograph restoration Certified watchmaker and service center parts supply FAQ Q1: Is this a genuine ETA part? A: Yes \u2014 this is a\u00a0genuine ETA 7750-8690 Hour Counter Lock,\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 7750-8690\u00a0is the specific\u00a0Hour Counter Lock\u00a0for the 12-hour counter mechanism in 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 Hour Counter Lock do? A: The\u00a0Hour Counter Lock (7750-8690)\u00a0is the\u00a0locking mechanism for the chronograph\u2019s 12-hour counter. The 7750 chronograph has\u00a0three registers: the central seconds hand, the 30-minute counter at 12 o\u2019clock, and the\u00a012-hour counter\u00a0(typically at 6 o\u2019clock). The 12-hour counter advances\u00a0one position every 30 minutes\u00a0of chronograph running. The\u00a0Hour Counter Lock\u00a0ensures that the\u00a012-hour counter gear is locked in precise positions\u00a0during chronograph operation \u2014 without locking, the counter could\u00a0drift or advance incorrectly. During the chronograph\u00a0reset sequence, the lock also coordinates with the reset hammers to\u00a0release the counter\u00a0for correct 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":"6","priceCurrency":"USD","availability":"http://schema.org/InStock","itemCondition":"NewCondition","priceValidUntil":"2027-12-31","url":"https://www.soflypart.com/product/eta-7750-8690-hour-counter-lock/?attribute_pa_brand=eta"}}],"@id":"https://www.soflypart.com/product/eta-7750-8690-hour-counter-lock/#richSnippet"}]}
```