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