The automatic COSC-Licensed PF441 chronometer movement that this Parmigiani classic runs on provides a 55-hour power reserve, owing to its oscillating mass, and that is in delicately engraved gold, and can be admired with the sapphire crystal caseback. And admire it you will, since it displays many of the very https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/