The automatic COSC-Accredited PF441 chronometer movement that this Parmigiani vintage operates on provides a fifty five-hour electrical power reserve, owing to its oscillating mass, which happens to be in delicately engraved gold, and will be admired with the sapphire crystal caseback. And admire it you may, because it displays a https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/