ETA 7750-8320 Movement Clutch Spring
ETA 7750-8320 Movement Clutch Spring - Image 2

ETA 7750-8320 Movement Clutch Spring

$2.50
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Quantity Discount (%) Price
1 - 2 — $2.50
3 - 4 5 % $2.38
5 - 9 7 % $2.33
10 - 14 10 % $2.25
15+ 15 % $2.13
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Product Description

The ETA 7750-8320 Movement Clutch Spring is a genuine Swiss-made component for the ETA/Valjoux 7750 automatic chronograph movement. As a critical part of the chronograph mechanism, this spring provides essential tension to the clutch system that engages and disengages the chronograph function. It is a common service replacement part when chronograph start/stop issues occur .

Features & Function

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

  • Chronograph clutch component – provides tension to the chronograph engagement system

  • Critical for chronograph operation – ensures smooth start, stop, and reset functions 

  • Direct replacement – drop-in replacement for worn or damaged clutch springs

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

Specifications

  • Part Number: 7750-8320

  • Compatible Movements: ETA/Valjoux 7750, 7751, 7753, 7754, 7760, 7765

  • Function: Chronograph clutch spring

  • Caliber Diameter: 30.0 mm

  • Caliber 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 7750-series movements

  • Chronograph mechanism repair – replacing worn or broken clutch springs

  • Chronograph function restoration – resolving start/stop engagement issues 

  • 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 7750-8320), made in Switzerland. It is not an aftermarket or generic copy .

2. Which movements is this clutch spring compatible with?
This clutch spring is compatible with the ETA/Valjoux 7750 and its variants, including 7751, 7753, 7754, 7760, and 7765.

3. What is the function of the clutch spring?
The clutch spring provides tension to the chronograph clutch mechanism, ensuring proper engagement and disengagement of the chronograph function during start/stop operations .

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