The automatic COSC-Qualified PF441 chronometer movement that this Parmigiani classic runs on offers a fifty five-hour electrical power reserve, owing to its oscillating mass, which happens to be in delicately engraved gold, and will be admired from the sapphire crystal caseback. And admire it you'll, mainly because it shows some https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/