The automatic COSC-Qualified PF441 chronometer motion that this Parmigiani basic runs on offers a fifty five-hour electric power reserve, owing to its oscillating mass, which happens to be in delicately engraved gold, and might be admired throughout the sapphire crystal caseback. And admire it you are going to, since it https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/