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