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This is a genuine Breguet Caliber 507DR barrel complete, a Swiss‑made original component for Breguet‘s iconic Tradition collection manual‑winding movement. The barrel complete is a pre‑assembled unit containing the mainspring, arbor, and barrel drum, serving as the power source for the movement, providing the Caliber 507DR with approximately 50 hours of power reserve. Sold under a core exchange policy (“return broken part”), this brand new original part is essential for watchmakers restoring proper power delivery when the original mainspring becomes worn or fatigued.
Genuine Breguet Part – Swiss factory‑original for Caliber 507DR, not a copy.
Pre‑assembled Barrel – Includes mainspring, barrel drum, and arbor; eliminates manual winding risks.
50‑Hour Power Reserve – Delivers factory‑spec power output for the Caliber 507DR.
Return Broken Part Required – This part is sold under a core exchange policy; the damaged original barrel must be returned to the supplier.
Essential for Service – Efficient solution for tired, broken mainsprings or reduced winding performance.
| Parameter | Details |
|---|---|
| Part Name | Barrel Complete |
| Compatible Movement | Breguet Caliber 507DR (manual‑winding) |
| Variant | 507DR1 (silicon hairspring version) |
| Power Reserve | Approx. 50 hours |
| Jewels | 34 |
| Frequency | 21,600 vph (3 Hz) |
| Barrel Position | Centrally visible on the dial side in the Tradition collection |
| Origin | Switzerland |
| Condition | Brand new, genuine (core return required) |
Breguet Caliber 507DR manual‑winding movement (Tradition references 7027, 7057, 7037, etc.).
Breguet Caliber 507DR1 (upgraded version with silicon hairspring).
Replacement of tired, broken, or low‑torque mainsprings during movement service.
Fixes insufficient power reserve or low amplitude caused by mainspring issues.
The centrally located barrel is the most visible element on the dial side of the Tradition collection; replacing it restores the movement‘s complete aesthetic.
1. Is this a genuine Breguet barrel?
Yes. It is a Swiss factory‑original part for Caliber 507DR / 507DR1, not a copy.
2. What does “return broken part” mean?
The supplier requires that the damaged old barrel be returned (core exchange). Confirm the policy before ordering.
3. Is the barrel the same for 507DR and 507DR1?
Yes. Both versions use an identical barrel assembly – fully interchangeable.
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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