The automated COSC-Qualified PF441 chronometer movement that this Parmigiani basic operates on provides a 55-hour ability reserve, owing to its oscillating mass, that's in delicately engraved gold, and may be admired in the sapphire crystal caseback. And admire it you might, as it displays some of the best decoration that https://www.watchesworld.com/understanding-the-complex-world-of-chronometers/