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This is the Bergeon 30015 series of hairspring-collet broaches, made in Switzerland, specifically designed for adjusting the inner diameter of hairspring collets (balance wheel hubs) in watchmaking. The series includes three models – P, M, and G – covering different working ranges: 30015-P (0.40–0.90 mm), 30015-M (0.55–0.95 mm), and 30015-G (0.70–1.25 mm). This product is genuine Bergeon, made in Switzerland, and brand new in original packing.
Brand：Bergeon (Swiss)
Models：30015-P / 30015-M / 30015-G
Origin：Made in Switzerland
Quality：Genuine original, brand new in original packaging
Type：Hairspring-collet broaches
Working Ranges：
30015-P：0.40 – 0.90 mm
30015-M：0.55 – 0.95 mm
30015-G：0.70 – 1.25 mm
Application：Adjusting hairspring collet inner diameter
1. Is this hairspring-collet broach set an original Bergeon genuine part?
Yes. It is manufactured by Bergeon in Switzerland, brand new in original packaging, not a third-party copy.
2. What models are included in this series?
Three models: 30015-P (0.40–0.90 mm), 30015-M (0.55–0.95 mm), and 30015-G (0.70–1.25 mm), covering a range of collet inner diameter adjustments.
3. How do I choose the right model?
Select based on the current collet inner diameter: P for smaller collets, M for medium collets, and G for larger collets. Choose a model that covers the target diameter.
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