Jaeger Lecoultre
Master Ultra Thin Réserve de Marche
Ref. Q1378420
A sophisticated timepiece from the Master Ultra Thin collection, this watch features a 39mm stainless steel case with a sunray-brushed silver dial and sapphire crystal. It combines elegance with advanced complications, including a power reserve indicator, date, and small seconds, all driven by Jaeger-LeCoultre's iconic Calibre 938 automatic movement. Known for its ultra-thin design and precision engineering, it appeals to collectors and enthusiasts of fine watchmaking.
crystalSapphire crystal
braceletBlack Alligator leather strap with folding buckle (or deployment clasp in some listings)
movementJaeger-LeCoultre Calibre 938/1, Automatic, 43-hour power reserve, 4 Hz (28,800 vph), 30 jewels, 273 components
functionsDate, power reserve indicator, small seconds
dial colorSilvered, Sunray-brushed
case diameter39mm
case materialStainless Steel
water resistance50 meters (5 bar)
year2013
A registered Jaeger Lecoultre Q1378420 carries a permanent RGATT passport: origin, history and owners, verifiable by anyone, and a documented history makes a watch easier to sell.