Master Ultra Thin Réserve de Marche masterpiece series of ultra-thin power reserve not only combines the legendary reliability and minimalist appearance, but also combines unparalleled superb technology, called a veritable watch masterpiece. For watch connoisseurs who wish to have an accurate and arty masterpiece, it will do its job. Simple lines, the perfect balance of the dial, mechanical watches iconic complex features, make this section watch infinite charm. Two classic complications - power reserve and pointer date display, elegantly combined. Through the sapphire crystal back cover, Jaeger-LeCoultre 938 self-winding movement at a glance. Power reserve A sophisticated differential gear system drives the power reserve display, which converts the accumulated energy of the Jaeger-LeCoultre 938 self-winding mechanical movement into time units and displays them. Re-interpretation of the dial Elegance and refinement are the main features of the new dial on the Master Ultra Thin Réserve de Marche watch. The clear and simple dial shows a unique charm. The symmetrical proportions and the 39 mm diameter add an elegance to one of the most iconic and complex features of a mechanical watch.