The automated COSC-Licensed PF441 chronometer movement that this Parmigiani common operates on offers a fifty five-hour electric power reserve, owing to its oscillating mass, that's in delicately engraved gold, and may be admired with the sapphire crystal caseback. And admire it you'll, because it shows some of the greatest decoration https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/