The automatic COSC-certified PF441 chronometer movement that this Parmigiani basic operates on provides a fifty five-hour power reserve, owing to its oscillating mass, and that is in delicately engraved gold, and can be admired with the sapphire crystal caseback. And admire it you may, mainly because it shows several of https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/