The watches all contain Perrelet’s automatic P-181 movement, with its exclusive double rotor winding system. Each of the quartet is available in a 44-mm case of either titanium or black-DLC-coated stainless steel, with anti-glare sapphire crystals front and back. They are mounted on black rubber straps with folding clasps of DLC-coated steel. Each of the four variations is limited to 88 pieces, priced at $6,150. You can scroll down (unless you are easily offended) to see the pictures on the four dials, minus the turbine rotor.