To mark its 150th anniversary, Chopard presents one of the major complications of the watchmaking art: the Equation of Time , in association with the Perpetual Calendar.
Further enhanced with a Tourbillon, this masterpiece of complexity &ndash- chronometer-certified by the COSC and bearing the Poinç-on de Genè-ve &ndash- is issued in a strictly limited edition.
L.U.C 150 all in one watch, with the new hand-wound L.U.C 4TQE calibre, entirely designed, developed and produced by Chopard Manufacture.
COSC Chronometer-certified and bearing the prestigious Poinç-on de Genè-ve quality hallmark, the L.U.C 4TQE movement houses four barrels giving it a seven-day power reserve.
It allows displays of the hours, minutes, small seconds on the tourbillon, a perpetual calendar showing a 24-hour indication, the day of the week, the date through a window, the month, the leap year, the power reserve, along with a 24-hour indication, the equation of time, sunrise and sunset times and moon phases.
The equation of time shows the difference between true solar time (that of nature) and mean solar time (or civilian time). The Earth follows an elliptical orbit around the earth, and its axis is also inclined in relation to the plane of the equator.
This means that the period of time between two passages of the sun through the highest point in the sky (noon) is not the same length throughout the year. It lasts exactly 24 hours just four times a year (on April 15th, June 14th, September 1st and December 24th).
For the rest of the year, the elapsed time is sometimes shorter and sometimes longer.
The difference between true solar time and mean solar time &ndash- which may vary between minus 16 minutes and 23 seconds on November 4th to plus 14 minutes and 22 seconds on February 11th &ndash- is referred to as the equation of time.
The display of this difference between natural and civil time is one of the complications featured in the new L.U.C 150 all in one model.
The 46 mm-diameter case of the L.U.C 150 all in one is crafted in white gold and water-resistant to 30 metres.
The multiple indications and complications of this perpetual calendar, equation of time and tourbillon watch are displayed on the gold guilloché--worked upper dial, as well as on the second dial on the case-back side.
In addition to the hours, minutes and small seconds on the tourbillon at 6 o'clock, the upper dial displays the perpetual calendar with 24-hour indication and the day of the week at 9 o'clock, the large date window at 12 o'clock, along with the month and the leap year at 3 o'clock.
The guilloché- gold plate of the dial on the case-back bears the equation of time, power reserve, 24-hour day/night indication, sunrise and sunset times, as well as the astronomical orbital moon-phase &ndash- set to coincide with Geneva &ndash- and its mechanical expression.
Fitted with a alligator leather strap with a gold tang buckle with the Chopard logo.
It is issued as a limited edition of 15 in white gold, 15 in rose gold and 15 in white gold set with baguette-cut diamonds.