Glossary
Breguet overcoil
Sometimes referred to as a "Breguet spiral", it controls the rate at which the mainspring unwinds.
Related themes:
- french: Spiral plat coudé ou Bréguet
- japanese: 巻上げヒゲゼンマイ／マキアゲヒゲゼンマイ
- chinese: 宝玑双层游丝
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