Chase-Durer Men's 246.4BB7-XL-BR Special Forces 1000XL Black Ionic-Plated Underwater Demolition Team Watch Precise Swiss-quartz movement Scratch-resistant sapphire crystal Solid 316L Black PVD coated stainless steel case and matching bracelet; screw-down crown case back; unidirectional bezel with 0-60 and 360 degree compass markers Super-Luminova advanced illumination system; chronograph functions with 12-hour, 60-minute, and 1/10th-second sub dials; date function at 4 o'clock; tachymeter inner chapter ring Water resistant to 990 feet (300 M):suitable for scuba diving to a depth of 30 meters for up to 2 hours