Despite the complexity of the Contemporary Operating Environment, the United States is still wedded to a national security system created in 1947. The United States places itself in jeopardy by using a system created at the end of World War II for...
Simple peep site with two apertures and ivory notepad on back of arm. Ivory pencil holder threaded into crossbar with nameplate. Three pivoting sun filters - green, red and gray. Brass index arm held in place with thumb screw. Initials: "SBR"...