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