The automated COSC-certified PF441 chronometer motion that this Parmigiani classic operates on provides a fifty five-hour power 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 are going to, mainly because it shows a https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/