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Breguet Overcoil Hairspring

A hairspring with a sharply curved outer end. This terminal curvature improves the spring’s concentric development compared to hairsprings with flat spirals.

Breguet Overcoil Hairspring

Click below for a video of a Breguet Overcoil Hairspring in action…

Click here to go to the Watchmaking Glossary main page

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  • BALANCE
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