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