This 41mm Super Sea Wolf Compression features a ceramic case, blue sunray dial, STP 1-11 Swiss-made automatic movement, 44 hr power reserve, Super-LumiNova hands and markers, blue rubber strap, and is water resistant to 200 meters. This watch is COSC certified. 41mm case, 20mm band width, sapphire crystal, Automatic movement with automatic analog display, Switzerland. Round ceramic case, with a blue dial. Blue, rubber band. Water resistant up to 200m - In general, suitable for professional marine activity and serious surface water sports, but not diving.