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