The automatic COSC-Qualified PF441 chronometer motion that this Parmigiani classic runs on offers a fifty five-hour power reserve, owing to its oscillating mass, and that is in delicately engraved gold, and will be admired in the sapphire crystal caseback. And admire it you can, as it displays a lot of https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/