The significance of this Grande Complication, presented at the SIHH 2013 as part of the Jubilee collection celebrating Jaeger-LeCoultre’s 180^th anniversary, is proportionate to the length of its name. It vividly illustrates the extent to which the “Grande Maison” from the Vallée de Joux transcends the borders of the watchmaking art. Endowed with the latest technologies developed by Jaeger-LeCoultre as part of its ongoing quest to enrich watchmaking tradition with a renewed sense of performance, this 180-piece limited series featuring a flying tourbillon with a cylindrical balance-spring and a perpetual calendar is in line with the history of the search for absolute precision dear to the founder of the Manufacture, to whom tribute is thus paid. Indeed, a reproduction of the gold medal awarded to Jaeger-LeCoultre at the 1889 Universal Exhibition in Paris for its watchmaking expertise and its inventive spirit is visible on the 22-carat gold oscillating weight of the new automatic Calibre 985, composed of 431 parts. In addition to the cylindrical balance-spring of the flying tourbillon, daringly topped by a small seconds subdial, the perpetual calendar provides an extremely legible display of the day, date, month, year and moon phase indications. Its new extra-white platinum case pays homage to the 19^th century and is inspired by the style codes of historical pocket-watches. The same codes are also reflected in several details of its design: hour-markers, traditional minute track, grained silver-toned dial finish. This delightfully understated new “dauphine” hands are entirely suited to the classical nature of this model. The Master Grande Tradition Cylindrique à Quantième Perpétuel radiates a perfect balance between classicism, purity and contemporary relevance, cleverly associating its historical origins with elegant modernism, while proudly proclaiming that it belongs to a watchmaking sphere of its own.