Complete circular computer, manual and original envelope. Technical manual is T.O. 5N5-14-14-1, Type CPU-73/P, Air Navigation Attack Computer,1 December 1965. Manual is 36pp, illus, 8x8", stapled. This computer was designed for Weapons Directors to assist air-to-air interceptor pilots in determining intercept parameters to shoot down enemy aircraft. Computer is very large, 8" diameter and has a reverse side for drift calculations. Computer and manual are in very good/unused condition. The envelope is split at top and bottom folds. A seldom-seen Cold War artifact.