Duomètre Sphérotourbillon White Gold
|Material: ||White gold|
|Diameter: ||44.00 mm|
|Height: ||15.00 mm|
|W/R: ||50.00 m|
Mechanical manual winding movement, approx. 1400 parts, 28,800 vibrations per hour, 2 barrels: 50-hour power-reserve for hours, minutes and the perpetual calendar, 10 hours for the striking mechanism in Grande Sonnerie (grand striking) mode.
Functions: hour, minute, Westminster chime, the longest melody ever chimed in the world, 4 striking modes: Grande Sonnerie, Petite Sonnerie, Minute-repeater mode (with activation system on the crown push-piece), Silence. Flying tourbillon: balance with regulating screws, 28,800 vibrations per hour (4 Hz). Perpetual calendar, retrograde day, month and date indications, leap year display.
The perpetual calendar mechanism features retrograde hands for all functions from date, month and weekday. A small leap year indication rounds off the calendar function. The instant mechanism is programmed until the year 2100, and in any case can be adjusted via push pieces hidden in the case between the lugs at 12 o’clock.
The flying tourbillon is cantilevered and thus held only at the underside. The whole mechanism, which consists of 73 parts, measures 12.42 millimetres in diameter and 3.85 in height. The lightweight titanium cage, placed on a lubricant-free ceramic ball bearing, is reduced to its bare essence and the 10-millimeter diameter balance wheel is fitted with four regulating screws, ten weight screws and a balance spring with Breguet over coil beating at 4 Hertz.
First used in the Master Minute Repeater of 2007, the patented ‘crystal gong’ features gongs attached to a layer of metallic foil coated onto the watch’s crystal to deliver the best possible sound. Made of a special, secret alloy, they are manufactured completely in one piece from the gong foot through to the whole wire; their cross section being square and not round in order to provide a larger contact point for the hammer which in turn can strike more forcefully. The crystal glass is then pressed into the case made of white gold – a case-material with one of the highest acoustic yield – sealing the watch.
|Date:||Date, Day, Leap Year, Month, Perpetual Calendar|
|Acoustic:||Grande Sonnerie, Minute Repeater, Petite Sonnerie|
|Additionals:||Tourbillon Escapement, Power Reserve Indicator|
In developing the Hybris Mechanica à Grande Sonnerie, Jaeger‑LeCoultre completely rethought the principle of the minute repeater. Indicating the time thanks to the crystal clear tones of a Westminster chime, this exceptional model comprising over 1472 parts is one of the most complex watches ever made in the entire history of horology.