Jaeger-LeCoultre launches the Duometre a Quantieme Lunaire
February 2011: The Duomètre line by Jaeger-LeCoultre gets a new member, the Quantième Lunaire, which shows time, date and the age of the moon with the unprecedented precision of the ingenious Dual-Wing-movement concept.
The Duomètre à Quantième Lunaire embodies the latest in horological achievements of Jaeger-LeCoultre. It displays time with a jumping seconds hand showing 1/6th of a second increments and additionally providing the date and the age of the moon in a separate sub-dial. The true genius of this watch however lies within the Dual-Wing movement concept, which features two independent power supplies: one entirely dedicated to creating a perfect timing foundation; the other solely for the display of time – hour, minute and seconds hands – as well as date and the age of the moon for the Northern as well as the Southern hemisphere.
The Dual-Wing concept bypasses a common problem in mechanical watches: any additional complication reduces the power of the winding barrel thus depriving the precisely tuned regulation organ of a steady flow of energy from the winding barrel. The regularity of the winding barrel’s energy to the going train and escapement remains of primary importance in order to measure time with the precision demanded for today’s mechanical wristwatches. Hence the influence of any given complication to the long-term rate of a watch can lead to deviations in time measurement hardly acceptable in such a valuable timepiece. This fact can be overcome by using a fully independent power source to run the complication, separating its power supply from that of the basic movement, which in turn is fed by its own winding barrel thus ensuring a constant flow of energy.
The fine details of the new Jaeger-LeCoultre Calibre 381 can be appreciated through the sapphire case back of the wristwatch: classical and understated with a touch of extravagance. The Duomètre à Quantième Lunaire will be produced in a limited edition of 300 yellow gold watches and in an unlimited pink gold version.