Longines dips into their archives to revive one of their coolest creations of the ‘60s, the high-frequency Ultra-Chron Diver. The brand’s history with high-frequency movements actually goes back much further, from a 50Hz (!) stopwatch capable of measuring 1/100th of a second in 1916, to classy 5Hz wrist watches in the late 50’s. In 1968
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