From Hamilton, the Men's Khaki Field Mechanical Brown NATO Leather Strap Watch features:  Stainless steel case Brown cow leather strap Crystal sapphire Pin buckle closure Durable NATO strap Swiss-made mechanical movement Three-hand display Dark dial with light Luminescent numerals Indexes showing hours and minutes 80-hour power reserve Case size approx. 38mm Lug width approx. 20mm Buckle width approx. 20mm Water Resistance: 5 bar (50 m) / 73 psi (164 ft) Imported.