The automatic COSC-Licensed PF441 chronometer movement that this Parmigiani basic operates on provides a 55-hour electric power reserve, owing to its oscillating mass, and that is in delicately engraved gold, and might be admired throughout the sapphire crystal caseback. And admire it you might, mainly because it shows many of https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/