Brand: Rolex Model: Deepsea Sea Dweller 44mm Reference Number: 116660-PVD-2 Movement: Automatic Rolex Caliber 3135 Functions: Hours, Minutes, Seconds, Date Display Case Material: Black PVD/DLC Stainless Steel for Durability Case Diameter: 44mm (Large, Bold Design) Case Shape: Round Bezel: Unidirectional Rotating Ceramic with Black Insert for Precise Timing Crown: Screw-down with Triple Waterproofness System Crystal: Scratch-resistant Sapphire Dial Color: Black Dial with Luminous Markers and Hands Luminous Features: Luminous Hands and Dial Markers for Easy Reading in Low Light Water Resistance: 3900 meters / 12,800 feet (Extreme Depths Diving) Helium Escape Valve: Prevents Pressure Build-up Ring Lock System: Withstands up to 2.98 Metric Tonnes of Water Pressure Perfect for: Professional Divers, Adventurers, and Watch Enthusiasts