This is the Momentum M-Ocean Black Dive Watch w/Re-Ply Sport Nylon Webbed Band Features: Solid 316L Stainless Steel, screw back, screw-down crown Heat-tempered, anti-glare mineral crystal Quartz analogue Battery: 371 silver oxide cell (approx. 3-5 years life) Water resistance: 200M / 660FT Case diameter with crown: 42.70mm Case diameter: 39.30mm Thickness: 11.68mm Band width: 18.00mm Band material: Re-Ply Sport Nylon Web (Scratch resistant sapphire crystal option available) The new M-Ocean: For men who prefer an understated watch, in a more traditional, mid-size watch. Big performance for a smaller wrist, with a 200M rated, solid steel case and ultra-reliable, screw-down crown. The luminous dial/hands make it easy to read, day or night. The long-life battery system delivers 5 years between battery changes. (The M-Ocean even warns you when the battery is running low.)