The automated COSC-certified PF441 chronometer motion that this Parmigiani vintage operates on offers a 55-hour ability reserve, owing to its oscillating mass, which is in delicately engraved gold, and might be admired with the sapphire crystal caseback. And admire it you will, since it displays many of the greatest decoration https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/