The Master Ultra Thin collection by Jaeger-LeCoultre is enriched by a new prestigious model that combines a tourbillon with a moon phase complication. In addition, the new Master Ultra Thin Tourbillon Moon features a peripheral ‘jumping’ date that significantly contributes to the distinctive look of the timepiece.
A master in the creation of sophisticated tourbillon mechanisms (just think to its Sphérotourbillon, Tourbillon Cylindrique or Gyrotourbillon), Jaeger-LeCoultre developed the new self-winding Calibre 983 starting from the Calibre 978 introduced in 2009 and winner of the International Chronometry Prize organised by the Horological Museum of Le Locle, Switzerland.
This calibre has been Jaeger-LeCoultre mainstay tourbillon movement ever since, and received a comprehensive update in 2019 featuring new high-end finishes.
Beating at a frequency of 4 Hz (28,800 vibrations per hour) and guaranteeing a power reserve of 45 hours, the new Calibre 983 is housed in a 41.5 mm x 12.10 round case crafted from a special pink gold alloy that the brands calls Le Grand Rose gold and that is characterised by a particular sheen and depth of colour while also offering enhanced resistance to fading over time.
The fully polished case features elongated lugs with a slim bezel that leaves space to the eggshell-white dial where the shape of the Dauphine hands is echoed by the arrow-shape of the applied golden indexes. Touches of red improves readability and animate the dial.
Set in the upper half of the dial, the triple moon phase indicator displays the Northern Hemisphere moon phases in the traditional way, using a polished golden disc surrounded by a deep blue sky scattered with stars. This is encircled by a ring which shows the Southern Hemisphere moon phases on the left and the Age of the Moon on the right, each indicated by a double-ended hand.
Weighing just 0.3 grams with its components, the titanium tourbillon cage is secured by a polished pink gold bridge and completes one revolution every 60 seconds. In order not to obstruct the tourbillon, the red-tipped date hand makes a 90-degree jump to rapidly glide from the 15th to the 16th of each month.
The finishes of the movement - including the Côtes de Genève decoration, the sunray pattern of the stripes on the main plate, the blued screws and the chamfered bridges - can be admired through the transparent sapphire crystal of the caseback. The oscillating weight, crafted from a single block of pink gold and bearing the 'anchor' motif which is also the Jaeger-LeCoultre logo, is cut out to reveal more components of the movement as it rotates.
Water resistant to 5 bar (approximately 50 metres / 165 feet) and delivered with an eight-year warranty in addition to the 1,000 Hours Control certification, the Jaeger-LeCoultre Master Ultra Thin Tourbillon Moon ref. Q1692410 has an indicative price of Euro 89,500 (including VAT) / US$ 88,500 (excluding sales taxes). jaeger-lecoultre.com