When Girard-Perregaux announced its Constant Escapement at Baselworld 2013, it was immediately considered to be one of the most impressive technological developments, not only of that year's fair, but in the brand's more than 220 years long history as well. Incorporating a constant force mechanism into a wristwatch movement is an immense challenge and one that resulted in numerous spectacular, albeit often compromised results. What allowed GP to leave the space-consuming fusee's, chains and other devices out of the equation was the utilization of a space-age material called silicon.http://www.ablogtowatch.com/girard-perregaux-constant-escapement/

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