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| − | *[[ | + | *On [[January 22]], [[1675/en|1675]] [[Huygens, Christiaan|Huygens]] commissioned [[Thuret (Turet), Isaac (gest. 1706)|Isaac Thuret]] to complete the first model (prototype) of a pocket watch using a balance-spring (hairspring) and [[balance]] (foliot) after their design. |
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Version vom 16. August 2011, 01:28 Uhr
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- On January 22, 1675 Huygens commissioned Isaac Thuret to complete the first model (prototype) of a pocket watch using a balance-spring (hairspring) and balance (foliot) after their design.