The automated COSC-certified PF441 chronometer movement that this Parmigiani basic operates on provides a 55-hour electric power reserve, owing to its oscillating mass, that is in delicately engraved gold, and may be admired in the sapphire crystal caseback. And admire it you are going to, mainly because it displays a https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/