The automated COSC-Qualified PF441 chronometer movement that this Parmigiani basic runs on offers a 55-hour power reserve, owing to its oscillating mass, which can be in delicately engraved gold, and may be admired through the sapphire crystal caseback. And admire it you are going to, since it shows many of https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/