The automatic COSC-Licensed PF441 chronometer movement that this Parmigiani basic runs on offers a 55-hour electric power reserve, owing to its oscillating mass, that is in delicately engraved gold, and will be admired through the sapphire crystal caseback. And admire it you are going to, because it displays many of https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/