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