The automated COSC-Accredited PF441 chronometer motion that this Parmigiani vintage runs on provides a fifty five-hour ability reserve, owing to its oscillating mass, which happens to be in delicately engraved gold, and may be admired with the sapphire crystal caseback. And admire it you are going to, as it shows https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/