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This is a genuine Cartier second wheel, specifically designed for the Caliber 1847 MC and 1848 MC automatic movements, with specification H1 height 4.18 mm. As the final wheel in the movement’s gear train, it drives the center seconds hand, ensuring smooth and precise timekeeping. As an original factory part, it is the ideal choice for replacing worn or damaged second wheels during service or repair.
Genuine Cartier Part – Swiss factory‑original for Caliber 1847 MC / 1848 MC, not a copy.
Final Gear Train Wheel – At the end of the train, drives the center seconds hand for smooth, precise motion.
Precise Height H1 4.18 mm – Strictly meets factory dimensions for correct fit with other movement parts.
Essential for Service – Replace when the seconds hand does not move, wobbles, or timekeeping is inaccurate.
Compatible Movements – Designed for Cartier Caliber 1847 MC and 1848 MC automatic.
| Parameter | Details |
|---|---|
| Part Name | Second Wheel |
| Compatible Movements | Cartier Caliber 1847 MC, 1848 MC automatic |
| Height Specification | H1 = 4.18 mm |
| Type | Genuine original |
| Function | Drives the center seconds hand |
| Origin | Switzerland |
| Condition | Brand new, genuine |
Cartier Caliber 1847 MC and 1848 MC automatic movements (found in Santos, Ballon Bleu, Tank collections with in‑house 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 1847 MC / 1848 MC, not a copy.
2. What does “H1 4.18 mm” mean?
This is the overall height of the second wheel, ensuring precise vertical positioning within the movement to avoid interference with bridges or other wheels. Different calibers have different heights; this is specific to 1847/1848.
3. What are the symptoms of a damaged second wheel?
Symptoms: the movement runs but the seconds hand does not move; the seconds hand moves erratically or wobbles; the hand is loose due to a worn pivot.
4. What should I pay attention to during installation?
The second wheel sits above the escape wheel. Ensure both pivots drop into jewels and the teeth mesh correctly with adjacent wheels. Follow the Cartier technical guide. Professional installation is strongly recommended.
5. Does this second wheel fit other Cartier calibers like 1904 MC?
No. The 1904 MC has a different second wheel height – not interchangeable.
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