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