The automatic COSC-certified PF441 chronometer motion that this Parmigiani traditional runs on provides a 55-hour electrical power reserve, owing to its oscillating mass, which is in delicately engraved gold, and can be admired through the sapphire crystal caseback. And admire it you will, mainly because it displays a lot of https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/