The automatic COSC-Qualified PF441 chronometer motion that this Parmigiani classic operates on offers a 55-hour power reserve, owing to its oscillating mass, which happens to be in delicately engraved gold, and might be admired from the sapphire crystal caseback. And admire it you will, because it displays a lot of https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/