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This is a genuine Cartier second wheel for Caliber 1904‑PS, a Swiss‑made original component. As a key part of the gear train, the second wheel transmits power from the third wheel to the escapement and drives the center seconds hand, directly affecting timekeeping stability and accuracy. This original factory part is the ideal choice for watchmakers to restore seconds hand function and timekeeping precision when servicing the Caliber 1904‑PS movement.
Genuine Cartier Part – Swiss factory‑original for Caliber 1904‑PS, not a copy.
Gear Train Core – Sits between the third wheel and escape wheel, also drives the center seconds hand.
Precision Machined – Accurate gear teeth and pivots for smooth power transfer and low wear.
Essential for Service – Replace when the seconds hand does not move, wobbles, or timekeeping is inaccurate.
Compatible Movement – Designed for Cartier Caliber 1904‑PS automatic.
| Parameter | Details |
|---|---|
| Part Name | Second Wheel |
| Compatible Movement | Cartier Caliber 1904‑PS automatic |
| Type | Genuine original |
| Function | Transmits power to escapement, drives center seconds hand |
| Origin | Switzerland |
| Condition | Brand new, genuine |
Cartier Caliber 1904‑PS automatic movement (found in Cartier Ballon Bleu, Tank, Santos, etc., with in‑house automatic calibers).
Repair of seconds hand not moving, wobbling, inaccurate timekeeping, or stoppage.
Replacement of worn, broken‑tooth, or bent‑pivot second wheels during movement service.
1. Is this a genuine Cartier second wheel?
Yes. It is a Swiss factory‑original part for Caliber 1904‑PS, not a copy.
2. What are the symptoms of a damaged second wheel?
Symptoms: very slow running or stoppage; seconds hand does not move, moves weakly, or wobbles; unusual noise or hesitation in the gear train.
3. What should I pay attention to during installation?
The second wheel sits between the third wheel and escape wheel. Ensure both pivots drop into jewels and the teeth mesh correctly. Follow the Cartier technical guide. Professional installation is strongly recommended.
4. Does this second wheel fit other Cartier calibers like 1904‑CH MC?
No. 1904‑PS is a base automatic; 1904‑CH MC is a chronograph with a different train layout – not interchangeable.
5. When should it be replaced?
Inspect for worn, deformed, or broken teeth; bent or worn pivots. If accuracy cannot be restored after servicing other components, replace the second wheel.
