The automated COSC-Licensed PF441 chronometer motion that this Parmigiani classic operates on offers a 55-hour energy reserve, owing to its oscillating mass, that's in delicately engraved gold, and can be admired in the sapphire crystal caseback. And admire it you can, as it displays some of the greatest decoration that https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/