The automated COSC-certified PF441 chronometer movement that this Parmigiani vintage runs on offers a 55-hour electrical 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 are going to, as it displays a https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/