The St. Moritz Mark II is an official tactical watch. Its feature set retains all the classic M50 features that make this watch indestructible. A solid 316L stainless steel case, 500M/1650FT water resistance, and ultra hard, sapphire crystal let this watch stand up to any water activity. Analog display. Buckle clasp. Rubber band material. The Mark II Watch is tested to a water depth of 1,640'.