Jaeger Le Coultre Duometre Chronograph watch, round platinum case (42mm diameter), black alligator leather strap with platinum deployant clasp, platinum color dial with blue steeled and silver hands, split-second markers, chronograph functions, power reserve indicator, minute-unit indicator, jumping seconds, 48 jewel Caliber 380 self-winding mechanical movement with 50 hour power reserve, scratch-resistant sapphire crystal, water-resistant to 50 meters (165 feet).
Coming back to the Jaeger-LeCoultre Duometre Chronograph, what is "Duometre" and what makes it special? The basic idea was to separate the normal time keeping function of the watch (hours, minutes, and seconds) from the chronograph function. In most chronograph wristwatches, the time keeping and chronograph functions share a common power source. In simple terms, this means that when the chronograph function is operated, power to the time keeping function is reduced and thus affects the accuracy of time keeping. The Duometre overcame this problem by using two separate power sources (and gear trains) ? one for the time keeping function and another for the chronograph function. Sounds simple? Not so. Until now, two separate power sources in a wristwatch have been reserved only for the super complicated sonnerie (clock) watches and are difficult to construct. So the Duometre (dual meter in French) is akin to having two watches in one.
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