Duomètre

The Duomètre is the watch that lets a Jaeger-LeCoultre run a chronograph, a foudroyante, a moon phase, or a tourbillon without robbing the timekeeping of one iota of amplitude. That is the whole point of it, and it is why collectors who already own a Reverso and a Master Ultra Thin eventually work their way here. Introduced in 2007 at the Geneva salon, the Duomètre runs what the Grande Maison calls the Dual-Wing concept: two independent barrels and two independent gear trains, one feeding the time display, the other feeding the complication, joined by a single escapement that keeps both in step. When you fire the chronograph or advance the calendar, the energy comes from a separate reservoir, so the balance never loses torque and the rate holds. We buy and sell these regularly at our counter on 47th Street, and the pitch we give collectors is simple: this is one of the few genuinely original mechanical ideas to come out of the modern era of Swiss watchmaking, and Jaeger-LeCoultre made every part of it in-house. The foudroyante seconds hand at 6 o'clock, whirling one full revolution per second in six jumps, is the tell. Once you see it in the metal you understand why the Duomètre has a cult following that outruns its production numbers.