The automated COSC-Licensed PF441 chronometer motion that this Parmigiani classic operates on provides a 55-hour 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 are going to, since it shows several of the https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/