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