---
description: Genuine ETA 2671-721 balance wheel for ETA 2671. Swiss-made complete balance assembly for ladies' automatic movement repair and restoration.
title: ETA 2671-721 Movement Balance Wheel - Sofly
image: https://www.soflypart.com/wp-content/uploads/2019/06/2671balance.jpg
---
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- **ETA 2671-721 Movement Balance Wheel**
[](https://www.soflypart.com/wp-content/uploads/2019/06/2671balance.jpg)
[](https://www.soflypart.com/wp-content/uploads/2019/06/2671balanceb.jpg)
# ETA 2671-721 Movement Balance Wheel
$80.00
You Saved
| Brand | Choose an option ETA- 
Clear |
| --- | --- |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $80.00 |
| 3 - 4 | 5% | $76.00 |
| 5 - 9 | 7% | $74.40 |
| 10 - 14 | 10% | $72.00 |
| 15+ | 15% | $68.00 |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $80.00 |
| 3 - 4 | 5% | $76.00 |
| 5 - 9 | 7% | $74.40 |
| 10 - 14 | 10% | $72.00 |
| 15+ | 15% | $68.00 |
ETA 2671-721 Movement Balance Wheel quantity
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## Product Description
The **ETA 2671-721 Movement Balance Wheel** is a genuine Swiss-made component for the ETA 2671 automatic movement family, with part number 2671-721, Article 23. As the heart of the mechanical timepiece, the balance wheel is an oscillating component that, together with the hairspring, forms a harmonic oscillator regulating the gear train’s pace . This pre-assembled, timed balance unit is essential for watchmakers restoring proper amplitude and rate accuracy when the original balance becomes damaged or worn. The ETA 2671 is a 17.2mm automatic caliber widely used in ladies’ watches from brands including Tissot, Mido, Longines, and Tudor .
## Features & Function
- **Genuine ETA part** – authentic Swiss-made, pre-assembled balance complete with hairspring and stud
- **Regulating system component** – controls the oscillation rate for accurate timekeeping
- **NIVAROX II balance** – anti-magnetic and temperature-compensated material for stable performance
- **Incabloc shock protection compatible** – protects the delicate balance staff pivots from impact
- **Direct replacement** – drop-in replacement for worn or damaged balance assemblies
## Specifications
- **Part Number**: 2671-721 / 721
- **Article Number**: 23
- **Compatible Movement**: ETA 2671
- **Movement Diameter**: 17.2 mm (7¾”’)
- **Movement Height**: 4.80 mm
- **Jewels**: 25 (for this version)
- **Frequency**: 28,800 vph (4 Hz)
- **Power Reserve**: \~38 hours
- **Balance Type**: NIVAROX II anular balance
- **Shock Protection**: Incabloc
- **Origin**: Switzerland (ETA factory part)
- **Condition**: Brand new
## Applications
- **Service and overhaul** of ETA 2671 movements
- **Balance assembly replacement** – replacing damaged, broken, or worn balance wheels
- **Timekeeping restoration** – restoring correct amplitude and rate to the movement
- 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 2671-721), made in Switzerland. It is the factory-assembled and timed balance complete for the ETA 2671 movement family.
**2. Which movements is this balance wheel compatible with?**
This balance wheel is specifically designed for the **ETA 2671** movement, a 17.2 mm automatic caliber widely used in ladies’ watches . The 2671 is based on the Zenith 48.5AF and has been in production since 1971 .
**3. What is the function of the balance wheel?**
The balance wheel is part of the **regulating system** that controls the oscillation rate of the movement, ensuring accurate timekeeping and stable performance . It works together with the hairspring to form a harmonic oscillator that regulates the gear train’s pace .
## 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 heart of the mechanical timepiece, the balance wheel is an oscillating component that, together with the hairspring, forms a harmonic oscillator regulating the gear train's pace\u00a0. This pre-assembled, timed balance unit is essential for watchmakers restoring proper amplitude and rate accuracy when the original balance becomes damaged or worn. The ETA 2671 is a 17.2mm automatic caliber widely used in ladies' watches from brands including Tissot, Mido, Longines, and Tudor\u00a0. Features & Function Genuine ETA part\u00a0\u2013 authentic Swiss-made, pre-assembled balance complete with hairspring and stud Regulating system component\u00a0\u2013 controls the oscillation rate for accurate timekeeping NIVAROX II balance\u00a0\u2013 anti-magnetic and temperature-compensated material for stable performance\u00a0 Incabloc shock protection compatible\u00a0\u2013 protects the delicate balance staff pivots from impact\u00a0 Direct replacement\u00a0\u2013 drop-in replacement for worn or damaged balance assemblies Specifications Part Number: 2671-721 / 721 Article Number: 23 Compatible Movement: ETA 2671 Movement Diameter: 17.2 mm (7\u00be''')\u00a0 Movement Height: 4.80 mm\u00a0 Jewels: 25 (for this version)\u00a0 Frequency: 28,800 vph (4 Hz)\u00a0 Power Reserve: ~38 hours\u00a0 Balance Type: NIVAROX II anular balance\u00a0 Shock Protection: Incabloc\u00a0 Origin: Switzerland (ETA factory part) Condition: Brand new Applications Service and overhaul\u00a0of ETA 2671 movements Balance assembly replacement\u00a0\u2013 replacing damaged, broken, or worn balance wheels Timekeeping restoration\u00a0\u2013 restoring correct amplitude and rate to the movement Suitable for\u00a0professional watchmakers\u00a0and\u00a0experienced repair technicians FAQs 1. 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Features & Function Genuine ETA part\u00a0\u2013 authentic Swiss-made, pre-assembled balance complete with hairspring and stud Regulating system component\u00a0\u2013 controls the oscillation rate for accurate timekeeping NIVAROX II balance\u00a0\u2013 anti-magnetic and temperature-compensated material for stable performance\u00a0 Incabloc shock protection compatible\u00a0\u2013 protects the delicate balance staff pivots from impact\u00a0 Direct replacement\u00a0\u2013 drop-in replacement for worn or damaged balance assemblies Specifications Part Number: 2671-721 / 721 Article Number: 23 Compatible Movement: ETA 2671 Movement Diameter: 17.2 mm (7\u00be''')\u00a0 Movement Height: 4.80 mm\u00a0 Jewels: 25 (for this version)\u00a0 Frequency: 28,800 vph (4 Hz)\u00a0 Power Reserve: ~38 hours\u00a0 Balance Type: NIVAROX II anular balance\u00a0 Shock Protection: Incabloc\u00a0 Origin: Switzerland (ETA factory part) Condition: Brand new Applications Service and overhaul\u00a0of ETA 2671 movements Balance assembly replacement\u00a0\u2013 replacing damaged, broken, or worn balance wheels Timekeeping restoration\u00a0\u2013 restoring correct amplitude and rate to the movement Suitable for\u00a0professional watchmakers\u00a0and\u00a0experienced repair technicians FAQs 1. Is this a genuine ETA part? Yes, this is a\u00a0genuine ETA factory part\u00a0(reference 2671-721), made in Switzerland. It is the factory-assembled and timed balance complete for the ETA 2671 movement family. 2. Which movements is this balance wheel compatible with? This balance wheel is specifically designed for the\u00a0ETA 2671\u00a0movement, a 17.2 mm automatic caliber widely used in ladies' watches\u00a0. The 2671 is based on the Zenith 48.5AF and has been in production since 1971\u00a0. 3. What is the function of the balance wheel? The balance wheel is part of the\u00a0regulating system\u00a0that controls the oscillation rate of the movement, ensuring accurate timekeeping and stable performance\u00a0. It works together with the hairspring to form a harmonic oscillator that regulates the gear train's pace\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. 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