The automated COSC-certified PF441 chronometer movement that this Parmigiani common operates on provides a 55-hour electric power reserve, owing to its oscillating mass, that's in delicately engraved gold, and will be admired in the sapphire crystal caseback. And admire it you might, as it displays many of the best decoration https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/