The automatic COSC-certified PF441 chronometer movement that this Parmigiani classic runs on provides a fifty five-hour ability reserve, owing to its oscillating mass, that's in delicately engraved gold, and may be admired in the sapphire crystal caseback. And admire it you'll, because it shows a few of the best decoration https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/