The automated COSC-Licensed PF441 chronometer movement that this Parmigiani vintage operates on provides a fifty five-hour electric power reserve, owing to its oscillating mass, that is in delicately engraved gold, and might be admired through the sapphire crystal caseback. And admire it you might, mainly because it displays a number https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/