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