The automatic COSC-Licensed PF441 chronometer motion that this Parmigiani typical runs on offers a 55-hour electric power reserve, owing to its oscillating mass, which is in delicately engraved gold, and might be admired with the sapphire crystal caseback. And admire it you will, mainly because it shows a few of https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/