123D electron tube manufactured by United Technical Publications, listed as 123D (circa 1965).

190D electron tube manufactured by United Technical Publications, listed as 190D (circa 1965).

167D electron tube manufactured by United Technical Publications, listed as 167D (circa 1965).

164D electron tube manufactured by United Technical Publications, listed as 164D (circa 1965).

169D electron tube manufactured by United Technical Publications, listed as 169D (circa 1965).

162D electron tube manufactured by United Technical Publications, listed as 162D (circa 1965).

154D electron tube manufactured by United Technical Publications, listed as 154D (circa 1965).

172D electron tube manufactured by United Technical Publications, listed as 172D (circa 1965).

180D electron tube manufactured by United Technical Publications, listed as 180D (circa 1965).

150D electron tube manufactured by United Technical Publications, listed as 150D (circa 1965).

CP72 electron tube manufactured by United Technical Publications, listed as CP72 (circa 1965).

G5 electron tube manufactured by United Technical Publications, listed as G5 (circa 1965).

G4 electron tube manufactured by United Technical Publications, listed as G4 (circa 1965).

G3 electron tube manufactured by United Technical Publications, listed as G3 (circa 1965).

G2 electron tube manufactured by United Technical Publications, listed as G2 (circa 1965).

CM75 electron tube manufactured by United Technical Publications, listed as CM75 (circa 1965).

F3 electron tube manufactured by United Technical Publications, listed as F3 (circa 1965).

F2 electron tube manufactured by United Technical Publications, listed as F2 (circa 1965).

D42 electron tube manufactured by United Technical Publications, listed as D42 (circa 1965).

D30 electron tube manufactured by United Technical Publications, listed as D30 (circa 1965).