The automated COSC-Accredited PF441 chronometer motion that this Parmigiani classic runs on provides a 55-hour ability reserve, owing to its oscillating mass, that's in delicately engraved gold, and will be admired with the sapphire crystal caseback. And admire it you can, because it displays a number of the greatest decoration https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/