Master ultra thin power reserve UNWORN full set - Ref Q1378421 Steel case on black crocodile strap with double JLC folding clasp, silver dial, large seconds at 6 o'clock, calendar and power reserve indicator, automatic movement Caliber 938, Vibrations per hour 28800, Jewels 39, Thickness: 4.97 mm, Power reserve: 70 hours, sapphire crystal and caseback, delivered with JLC box and papers, new and immaculate condition