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This is a genuine Blancpain barrel complete for Calibers 950, 951, and 953, a Swiss‑made original component for Blancpain‘s ultra‑thin automatic movement family. The barrel complete is a pre‑assembled unit containing the mainspring, arbor, and barrel drum, serving as the power source for the movement. This original factory part is the ideal choice for watchmakers to restore proper power reserve and timekeeping accuracy when the original mainspring becomes worn or fatigued.
Genuine Blancpain Part – Swiss factory‑original for Calibers 950/951/953, 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 reserve for reliable everyday timekeeping.
Cross‑Caliber Compatibility – This barrel is shared across the 950, 951, and 953 movement family for simplified inventory management.
Essential for Service – Efficient solution for tired, broken mainsprings or reduced winding performance.
| Parameter | Details |
|---|---|
| Part Name | Barrel Complete |
| Compatible Movements | Blancpain Caliber 950, 951, 953 (automatic) |
| Movement Diameter | Approx. 21–29.2 mm (varies by caliber) |
| Movement Thickness | Approx. 3.25–3.28 mm |
| Power Reserve | Approx. 40 hours |
| Jewels | Approx. 19–21 (depending on variant) |
| Frequency | 21,600 vph (3 Hz) |
| Origin | Switzerland |
| Condition | Brand new, genuine |
Blancpain Caliber 950 automatic (found in Villeret Ultra‑Slim and other classic references).
Blancpain Caliber 951 automatic (found in Villeret Ultraplate, Léman, and other small‑size watches).
Blancpain Caliber 953 automatic (found in Villeret Ultraplate ladies‘ watches and some complications).
Replacement of tired, broken, or low‑torque mainsprings during movement service.
Fixes insufficient power reserve or low amplitude caused by mainspring issues.
1. Is this a genuine Blancpain barrel?
Yes. It is a Swiss factory‑original part for Calibers 950/951/953, not a copy.
2. Does this barrel fit all 950/951/953 variants?
Yes. These three calibers are derivatives of the same movement platform and share identical barrel dimensions – fully interchangeable.
3. What is the power reserve of the 950/951/953 movements?
Approximately 40 hours. With this original barrel, each caliber achieves factory‑spec power reserve.
4. 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.
5. 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. It is also more convenient than hand‑winding a new spring.
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