Breguet spring/en
Version vom 8. April 2009, 00:41 Uhr von 87.157.231.30 (Diskussion)
Breguet spring
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Balance spring with terminal curve whose final curve is formed around the actual balance spring according to precise calculations. With this invention, Abraham-Louis Breguet was able ti considerably reduce the effects of the dynamic balance error of a flat Archimedean balance spring.