Jaeger LeCoultre Duomètre à Chronographe Swiss Watch Review
Jaeger LeCoultre Duometre Chronograph is a specialized collection dedicated to one unique model. A chronograph wrist watch, Duometre lacks central hour-minute hands; two dials, one showing time and the other serving the chronograph function, are positioned beside each other, occupying respectively the left and right side of the front face.
To further differentiate the chronograph from regular timekeeping, the designers assigned colors to the differently shaped hands: blue for the chrono, golden for the watch itself.
Dial configuration immediately betrays Duometre's purpose as that of a precise timekeeping instrument, rather than of another stylishly executed, dressy timepiece. There are nine hands moving on the face of this watch, indicating hours, minutes, seconds and power reserve. Besides the crown and the push button on the side of the case, Duometre Chronograph presents a nearly perfect symmetry of layout.
The visually expressed balance between the left and the right alludes, in abstract, to a weighing device – the one held by Themis comes to mind. Perhaps Jaeger LeCoultre wish to align time with justice, or to remind us how intertwined the two concepts can be (especially in law professions).
JLC Duometre a Chronographe (the French spelling) incorporates a complicated mechanical caliber distinct especially for its dual power reserve function. The hand-winding mechanism stores power separately for regular time and for the chronograph, two hands of appropriate color indicating the remaining power near the lower rim, roughly at five and seven o'clock. This engineering achievement is unique in mechanical watchmaking industry (though not altogether outlandish, considering the 30 days power reserve put inside some A. Lange & Sohne watches.)
Let's have a closer look at the main feature. Duometre's chronograph is actually richer in function than the regular time dial – it includes hours, minutes and seconds hand, and a jumping seconds hand (one sixth of a second accuracy) on top of that. Additionally, the chronograph dial on the right includes a minute aperture that displays minutes digitally (as opposed to the pointing markers of the dials – not to confuse with electronic devices), and facilitates the time reading process. Overall, this is a highly complicated, and eventually conceptual watch.