The automated COSC-Qualified PF441 chronometer movement that this Parmigiani traditional runs on provides a 55-hour power reserve, owing to its oscillating mass, which is in delicately engraved gold, and will be admired from the sapphire crystal caseback. And admire it you are going to, because it displays a number of https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/