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This is a genuine Jaeger‑LeCoultre barrel complete for Caliber 924 automatic movement, Swiss‑made. The pre‑assembled unit contains the mainspring, arbor, and barrel drum, serving as the power source of the movement, delivering stable energy output and providing approximately 40 hours of power reserve. This original factory part is the ideal replacement for watchmakers to restore mainspring tension and resolve insufficient power issues during service.
Genuine JLC Part – Swiss factory‑original for Caliber 924, not a copy.
Pre‑assembled Barrel – Includes mainspring, barrel drum, and arbor; eliminates manual winding risks.
Standard Power Reserve – Provides approximately 40 hours of power for the Caliber 924 movement.
Direct Replacement – Identical dimensions and interface to the original component.
Essential for Service – Efficient solution for tired, broken mainsprings or low torque.
| Parameter | Details |
|---|---|
| Part Name | Barrel Complete |
| Compatible Movement | Jaeger‑LeCoultre Caliber 924 automatic |
| Movement Diameter | Approx. 22.5 mm (estimate) |
| Movement Height | Approx. 4.2 mm (estimate) |
| Jewels | 21 (estimate) |
| Frequency | 28,800 vph (4 Hz) |
| Power Reserve | Approx. 40 hours |
| Origin | Switzerland |
| Condition | Brand new, genuine |
Jaeger‑LeCoultre Caliber 924 automatic movement (found in Reverso Classic collection).
Replacement of tired, broken, or low‑torque mainsprings during movement service.
Fixes insufficient power reserve or low amplitude caused by mainspring issues.
Quick replacement of the barrel assembly without separate mainspring winding.
1. Is this a genuine Jaeger‑LeCoultre barrel?
Yes. It is a Swiss factory‑original part for Caliber 924, not a copy.
2. What is the power reserve of Caliber 924?
With this original barrel, the Caliber 924 provides approximately 40 hours of power reserve.
3. What should I pay attention to during installation?
Clean the barrel arbor hole in the mainplate, apply a small amount of barrel grease. Seat the barrel correctly, ensuring it engages the train. Professional installation is recommended.
4. When should I replace the entire barrel instead of just the mainspring?
If the barrel drum is worn, the arbor hole is oval, or the mainspring is severely deformed, replace the complete barrel assembly.
5. Does this barrel fit other JLC calibers like Caliber 925?
Caliber 925 is an upgraded version of 924; the barrel may be interchangeable. Verify with the parts diagram.
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