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