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