ETA 2824-255 Hour Wheel

Product Description

The ETA 2824-255 Hour Wheel is a genuine Swiss-made component for the ETA 2824-2 automatic movement. As a critical part of the motion work, the hour wheel drives the hour hand, receiving power from the minute wheel and turning at a 12:1 ratio to ensure correct hour hand positioning. This brand new original part is essential for watchmakers restoring proper hour hand function and accurate time display when the original component becomes worn or damaged.

Features & Function

• Genuine ETA part – authentic Swiss-made component for the ETA 2824-2 movement

• Motion work component – drives the hour hand for accurate time display

• Direct replacement – drop-in replacement for worn or damaged hour wheels

• Precision-engineered – manufactured to ETA’s original specifications

• Compatible with Longines calibers – also listed for Longines calibers based on ETA 2824 such as the 631, 632, 633, and 634 series 

Specifications

• Part Number: 2824-255 / 255

• Article Number: 37

• Compatible Movement: ETA 2824-2 (also fits Longines calibers 631.1, 632.1, 633.1, 633.2, 634.1, 634.2) 

• Movement Diameter: 25.6 mm (11½”’)

• Movement Height: 4.60 mm 

• Jewels: 25 

• Frequency: 28,800 vph (4 Hz) 

• Power Reserve: ~38–40 hours 

• Origin: Switzerland (ETA factory part)

• Condition: Brand new

Applications

• Service and overhaul of ETA 2824-2 and compatible movements

• Motion work repair – replacing worn or damaged hour wheels

• Hour hand restoration – ensuring smooth and accurate time display

• 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 2824-255), made in Switzerland. It is not an aftermarket or generic copy.

2. Which movements is this hour wheel compatible with?

This hour wheel is specifically designed for the ETA 2824-2 movement. It is also compatible with Longines calibers based on the ETA 2824, including the 631, 632, 633, and 634 series . The ETA 2824-2 is a 25.6 mm automatic caliber introduced in 1982, widely regarded as one of the most robust and reliable mechanical movements in production .

3. What is the function of the hour wheel?

The hour wheel is part of the motion work that drives the hour hand. It receives power from the minute wheel and turns at a 12:1 ratio, ensuring the hour hand completes one rotation every 12 hours .

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