Chase-Durer Men&#39;s 850.4EGM Crossfire Gunmetal Ion-Plated Stainless Steel Chronograph Watch Precise Swiss-quartz movement Scratch-resistant sapphire crystal with anti-reflective coating Solid 316L gunmetal ion-plated stainless steel case and matching bracelet Super-Luminova advanced illumination system; chronograph functions with 12-hour, 30-minute, and 60-second sub dials; date function between 4 and 5 o'clock; tachymeter inner chapter ring Water resistant to 660 feet (200 M): suitable for recreational scuba diving