ETA 7750-224 Second Wheel

Product Description

The ETA 7750-224 Second Wheel is a genuine Swiss-made component for the ETA/Valjoux 7750 automatic chronograph movement. This second wheel plays a key role in transferring energy within the gear train, ensuring smooth chronograph function and stable time display. It features a long lower pivot design and is a critical replacement part for professional movement servicing .

Features & Function

• Genuine ETA/Valjoux part – authentic Swiss-made component for the ETA 7750 movement

• Gear train component – transfers energy from the third wheel to the chronograph mechanism

• Long lower pivot design – specified for correct engagement with the chronograph seconds wheel

• Critical for chronograph function – ensures smooth timing operation and stable time display

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

Specifications

• Part Number: 7750-224

• Compatible Movements: ETA 7750, 7751, 7753, 7754, 7755, 7758, 7760, 7765 

• Movement Diameter: 30.0 mm 

• Movement Height: 7.9 mm 

• Jewels: 25 

• Frequency: 28,800 vph (4 Hz) 

• Power Reserve: ~44–48 hours 

• Origin: Switzerland (ETA factory part)

• Condition: Brand new

Applications

• Service and overhaul of ETA 7750-series movements 

• Gear train repair – replacing worn or damaged second wheels

• Chronograph function restoration – ensuring smooth power transmission

• 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 7750-224), made in Switzerland. It is not an aftermarket or generic copy .

2. Which movement is this second wheel compatible with?
This second wheel is specifically designed for the ETA/Valjoux 7750 movement and its variants, including 7751, 7753, 7754, 7760, and others .

3. What is the function of the second wheel?
The second wheel is part of the gear train that transfers energy from the third wheel to the chronograph mechanism, ensuring smooth power flow for both normal timekeeping and chronograph operation.

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