Showcasing a subtle approach to military styling, this Hamilton Khaki Field Mechanical Men\'s Watch is powered by the exclusive H-50 hand winding movement to ensure maximum reliability. At A Glance  Presented on a durable black NATO strap 38mm case size with 50m water resistance Black dial with numbered hour markers Triangular indexes filled with Super-LumiNova Scratch resistant sapphire crystal glass Powered by the H-50 exclusive hand winding movement Power reserve of 80 hours