The automatic COSC-certified PF441 chronometer movement that this Parmigiani classic runs on provides a 55-hour ability reserve, owing to its oscillating mass, which is in delicately engraved gold, and will be admired in the sapphire crystal caseback. And admire it you can, since it displays several of the very best https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/