The automated COSC-Licensed PF441 chronometer motion that this Parmigiani basic operates on provides a fifty five-hour electricity reserve, owing to its oscillating mass, that is in delicately engraved gold, and can be admired in the sapphire crystal caseback. And admire it you'll, because it displays several of the finest decoration https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/