The automatic COSC-certified PF441 chronometer motion that this Parmigiani traditional runs on offers a fifty five-hour energy reserve, owing to its oscillating mass, which happens to be in delicately engraved gold, and might be admired through the sapphire crystal caseback. And admire it you will, as it displays some of https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/