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This is a genuine Cartier click for Caliber 1904, a Swiss‑made original component for Cartier‘s in‑house 1904 MC automatic movement. The click is a one‑way locking part in the automatic winding system that works with the ratchet wheel to prevent the mainspring from unwinding, maintaining winding tension. This brand new original part is essential for watchmakers restoring automatic winding function during service or repair.
Genuine Cartier Part – Swiss factory‑original for Caliber 1904 MC, not a copy.
Automatic Winding One‑Way Lock – Works with the ratchet wheel to prevent mainspring reversal, maintaining winding tension.
Precision Spring Mechanism – Built‑in spring provides consistent pressure for proper ratchet engagement.
Essential for Service – Replace when automatic winding efficiency drops, rotor spins freely, or unusual noises occur.
Compatible Movement – Designed for Cartier Caliber 1904 MC automatic.
| Parameter | Details |
|---|---|
| Part Name | Click |
| Compatible Movement | Cartier Caliber 1904 MC automatic (including variants 1904‑PS, 1904‑CH MC, etc.) |
| Type | Genuine original |
| Function | Prevents mainspring reversal, maintains automatic winding tension |
| Material | Hardened steel (with spring) |
| Origin | Switzerland |
| Condition | Brand new, genuine |
Cartier Caliber 1904 MC automatic movement (found in Ballon Bleu, Tank, Santos, etc., with in‑house automatic calibers).
Repair of reduced automatic winding efficiency, rotor spinning without winding, or unusual noises during winding.
Replacement of aged, deformed, or broken click spring assemblies during movement service.
1. Is this a genuine Cartier click?
Yes. It is a Swiss factory‑original part for Caliber 1904 MC, not a copy.
2. What are the symptoms of a damaged click?
Symptoms: rotor spins normally but automatic winding is very poor (low power reserve); manual winding works but automatic does not; unusual noise or clicking sound during automatic winding.
3. What should I pay attention to during installation?
The click is typically secured by a screw. Ensure the spring sits correctly in its groove and the click tooth properly engages the ratchet wheel. Follow the Cartier technical guide. Professional installation is strongly recommended.
4. Does the ratchet wheel need to be replaced at the same time?
Not always. If the ratchet wheel teeth are also worn, replace both. Try replacing the click first; if issues persist, replace the wheel.
5. Does this part fit all 1904 MC variants (e.g., 1904‑PS)?
Yes. The entire 1904 MC family (including two‑hand and chronograph versions) shares the same automatic winding module; the click is common.
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