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