JAEGER-LECOULTRE - a gentleman's Duomètre à Chronographe wrist watch. Reference 6002.28.S, serial 2460484. Signed manual wind dual power calibre 380. Cream dial with oversized subsidiary dial for time indication with applied Arabic numerals, subsidiary recording counter for 60 minute and 12 hour register, fan-form minute counter, jumping seconds subsidiary dial to six, main spring and chronograph power reserve indicators to five and seven. 18ct rose gold case with single rectangular chronograph pusher and exhibition case back, fitted to brown alligator strap with 18ct double deployant clasp. 42mm. Box and papers.

In a long and illustrious history, Jaeger-LeCoultre has produced over 1,000 different in-house calibres, none so more impressive than its ‘Dual Wing' calibre 380A. Maintaining the pace of innovation that the brand is known for, Jaeger-LeCoultre's watchmakers recognized that the additional power required for a chronograph reduced the accuracy of the overall time.

Capitalising on their expertise in the art of micro mechanics, Jaeger-LeCoultre's solution contains two independent power reserves, one of which is solely devoted to a chronograph. By providing a clear separation of its timekeeping and time measuring functions the Duomètre provides a real advance in chronograph technology.