* = Aircraft originally manufactured with conventional round instruments and were called "Round Eyes". Total A Models were 71 aircraft with 23 B Models for a total of 94 1957 tail numbers originally manufactured as "Round Eyes". Combined with the 1956 tail numbers, there were 88 A Models and 23 B Models for a final total of 111 "Round Eyes" manufactured.
% = Tactical Round Eye aircraft.
& = Lead production vertical A Model
&& = Lead production vertical B Model
@ - Beginning of 1957 S/N tactical vertical instrument aircraft. All 1958 & 1959 S/Ns were vertical inst. A/C.