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