The automatic COSC-certified PF441 chronometer movement that this Parmigiani vintage operates on provides a 55-hour electric power reserve, owing to its oscillating mass, and that is in delicately engraved gold, and will be admired through the sapphire crystal caseback. And admire it you are going to, since it shows some https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/