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