Word: patek
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Dates: during 1950-1959
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Light-Powered Clock. At the annual Swiss Industries Fair in Basel, Patek Philippe & Co. showed off a light-powered clock run by a photoelectric cell that needs to be exposed only four hours daily to any electric source or the sun to be recharged. The clock can store up enough light energy to last a year. Cost: about $500. G. Leon Breitling displayed a new engineer's stop watch with a movable slide rule around its rim, plus five hands and three data dials for calculations of speed and distance. Cost...