Authentic Rolex timepiece. Model number: 116660. Automatic movement. 44mm black and blue dial with luminous hour markers. Black/Blue PVD-coated stainless steel bezel featuring a unidirectional rotating design for dive time calculation (part of the Sea-Dweller Deepsea collection). Black/Blue PVD stainless steel case, screw-down crown. Sapphire crystal glass front and back. Caliber 3285 automatic self-winding mechanical movement with approximately 70 hours power reserve, visible oscillating balance at 6 o'clock position. Bracelet is black/blue PVD-coated Oyster link bracelet (part of the Deepsea collection). Water resistant up to 1000 meters / 3300 feet (~330 atm).