Complete set, Jaeger-lecoultre, Double Wing series, model: 6043420, manual mechanical, diameter: 40.5mm, 18k white gold material Case: Made of 18K white gold, 42mm in diameter, 12.7mm in thickness, large-sized for formal wear Movement: Cal.381 manual winding double-wing double-mainspring barrel movement, two independent power systems, 42-hour power reserve on each side, total 84 hours, 38 jewels bearings, frequency 28,800 VPH; The right side of the dial is hollowed out, allowing direct observation of the movement Bridges and gear polishing