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Breguet hairspring

noun
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Bre·​guet hairspring | \ brəˈgā- \

Definition of Breguet hairspring

: a flat spiral hairspring whose last outer coil is raised and curved back to a point near the center

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History and Etymology for Breguet hairspring

after Abraham L. Bréguet †1823 French horologist

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“Breguet hairspring.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/Breguet%20hairspring. Accessed 26 January 2020.

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