The automated COSC-Licensed PF441 chronometer movement that this Parmigiani traditional operates on offers a 55-hour energy reserve, owing to its oscillating mass, that is in delicately engraved gold, and can be admired with the sapphire crystal caseback. And admire it you will, mainly because it displays a number of the https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/