Original U.S. Vietnam War Air Navigation Attack Computer USAF U.S. Pilot Vietnam War issue circular slide rule for computing turning radii, etc. at various speeds. Fully marked, complete in U.S. Government 10" x 9.5" vinyl wallet. Plus a 36 page technical manual for the "Air Navigation Attack Computer" dated March, 1972. A piece of true U.S. Air Force history! Offered in NOS unissued condition.