The automatic COSC-certified PF441 chronometer motion that this Parmigiani vintage runs on offers a 55-hour electricity reserve, owing to its oscillating mass, that's in delicately engraved gold, and might be admired with the sapphire crystal caseback. And admire it you may, because it shows some of the best decoration that https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/