ETA 7750-210 Third Wheel

Product Description

The ETA 7750-210 Third Wheel is a genuine Swiss-made component for the ETA/Valjoux 7750 automatic chronograph movement. As an integral part of the gear train, this wheel transmits power from the center wheel to the chronograph seconds wheel, ensuring smooth and precise timekeeping for both normal time display and stopwatch functions. It is a critical replacement part for professional movement servicing.

Features & Function

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

• Gear train component – transmits power from the center wheel to the chronograph seconds wheel

• Critical for timekeeping – ensures smooth power flow for both time display and chronograph functions

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

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

Specifications

• Part Number: 7750-210

• Compatible Movement: ETA/Valjoux 7750

• Movement Diameter: 30.0 mm

• Movement Height: 7.9 mm

• Jewels: 25

• Frequency: 28,800 vph (4 Hz)

• Power Reserve: 42–48 hours

• Origin: Switzerland (ETA factory part)

• Condition: Brand new

Applications

• Service and overhaul of ETA/Valjoux 7750 movements

• Gear train repair – replacing worn or damaged third wheels

• Chronograph function restoration – ensuring smooth power transmission to the stopwatch mechanism

• 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 7750-210), made in Switzerland. It is not an aftermarket or generic copy.

2. Which movement is this third wheel compatible with?
This third wheel is specifically designed for the ETA/Valjoux 7750 automatic chronograph movement.

3. What is the function of the third wheel?
The third wheel is part of the gear train that transmits power from the center wheel to the chronograph seconds wheel, playing a key role in both normal timekeeping and chronograph operation.

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