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This is a precision elastic click spring, part 301, for the automatic winding module of the Calibre 3135 and derivatives (3130, 3131, 3185, 3186). Working with the click, it unidirectionally locks the ratchet wheel, ensuring bidirectional winding torque is effectively stored in the mainspring while preventing unwinding from shocks or vibrations — a critical guarantee for winding efficiency and timekeeping stability.
Model: Rolex 3135-301 (part 301)
Type: Click Spring
Compatible with: Calibre 3135 / 3130 / 3131 / 3185 / 3186
Function: Unidirectional ratchet lock, prevents mainspring unwinding
Features: Precision elastic component, critical for winding efficiency
Origin: Made in Swiss
1. Is it genuine?
This is an aftermarket part, not in original packaging, but dimensions and specifications exactly match the original.
2. How is the quality?
Precision elastic component, ensuring efficient winding and stable timekeeping.
3. What is it suitable for?
Ideal as a click spring replacement for Calibre 3135 and derivatives.
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