The automatic COSC-Accredited PF441 chronometer movement that this Parmigiani classic operates on offers a 55-hour ability reserve, owing to its oscillating mass, that is in delicately engraved gold, and will be admired with the sapphire crystal caseback. And admire it you'll, since it shows some of the best decoration that https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/