ETA 2892-2 Movement Balance Wheel | ETA Movement Parts

Quantity	Discount (%)	Price
1 - 2	—	$55.00
3 - 4	5 %	$52.25
5 - 9	7 %	$51.15
10 - 14	10 %	$49.50
15+	15 %	$46.75

Quantity

Discount (%)

Price

1 - 2

—

$55.00

3 - 4

5 %

$52.25

5 - 9

7 %

$51.15

10 - 14

10 %

$49.50

15+

15 %

$46.75

Quantity	Discount (%)	Price
1 - 2	—	$55.00
3 - 4	5 %	$52.25
5 - 9	7 %	$51.15
10 - 14	10 %	$49.50
15+	15 %	$46.75

Product Description

The ETA 2892-721 Balance Wheel is a genuine Swiss-made component for the ETA 2892 and 2892-A2 automatic movements. As a core regulating component, this balance assembly is made of classic Glucydur beryllium‑bronze alloy and equipped with the Etachron fine‑regulation system. It is pre‑poised and pre‑timed at the factory, serving as a direct OEM replacement ideal for full movement overhauls or repairing a damaged balance. Supplied brand‑new in original factory packaging, it offers the best possible guarantee for the movement’s precision timekeeping.

Features & Function

Genuine ETA part – authentic Swiss-made, pre-assembled balance complete with hairspring and stud

Glucydur balance – made of beryllium‑bronze alloy for excellent anti-magnetic and temperature-compensated properties

Etachron fine‑regulation system – enables precise rate adjustment via eccentric regulator and stud holder

Factory pre‑poised and pre‑timed – ready for installation with minimal adjustment required

Direct OEM replacement – ideal for full movement overhauls or repairing a damaged balance

Specifications

Part Number: 2892-721 / 721

Compatible Movements: ETA 2892, 2892-2, 2892-A2

Movement Diameter: 25.6 mm (11½”’)

Movement Height: 3.60 mm

Jewels: 21

Frequency: 28,800 vph (4 Hz)

Power Reserve: ~42 hours

Balance Material: Glucydur (beryllium‑bronze alloy)

Regulating System: Etachron

Shock Protection: Incabloc

Origin: Switzerland (ETA factory part)

Condition: Brand new, in original factory packaging

Applications

Service and overhaul of ETA 2892 family 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 2892-721), made in Switzerland. It is the factory-assembled and pre‑timed balance complete for the ETA 2892 family movements, supplied in original factory packaging.

2. What is the advantage of the Glucydur balance?

Glucydur is a beryllium‑bronze alloy that offers excellent anti‑magnetic properties and thermal stability, ensuring consistent performance across temperature changes. It is a hallmark of high‑grade Swiss movements.

3. Is the balance complete ready to install?

The balance complete is factory‑pre‑poised and pre‑timed, making it ready for installation with minimal adjustment. However, final rate regulation should be performed after installation to account for individual movement variations.