2N720A semiconductor manufactured by Allied Electronics, listed as 2N720A (circa 1964).

2N720 semiconductor manufactured by Allied Electronics, listed as 2N720 (circa 1964).

2N699 semiconductor manufactured by Allied Electronics, listed as 2N699 (circa 1964).

2N698 semiconductor manufactured by Allied Electronics, listed as 2N698 (circa 1964).

2N697 semiconductor manufactured by Allied Electronics, listed as 2N697 (circa 1964).

2N696 semiconductor manufactured by Allied Electronics, listed as 2N696 (circa 1964).

2N343B semiconductor manufactured by Allied Electronics, listed as 2N343B (circa 1964).

2N343 semiconductor manufactured by Allied Electronics, listed as 2N343 (circa 1964).

2N342B semiconductor manufactured by Allied Electronics, listed as 2N342B (circa 1964).

2N342A semiconductor manufactured by Allied Electronics, listed as 2N342A (circa 1964).

2N342 semiconductor manufactured by Allied Electronics, listed as 2N342 (circa 1964).

2N340 semiconductor manufactured by Allied Electronics, listed as 2N340 (circa 1964).

2N339 semiconductor manufactured by Allied Electronics, listed as 2N339 (circa 1964).

2N244 semiconductor manufactured by Allied Electronics, listed as 2N244 (circa 1964).

2N243 semiconductor manufactured by Allied Electronics, listed as 2N243 (circa 1964).

2N2243A semiconductor manufactured by Allied Electronics, listed as 2N2243A (circa 1964).

2N2243 semiconductor manufactured by Allied Electronics, listed as 2N2243 (circa 1964).

2N2222 semiconductor manufactured by Allied Electronics, listed as 2N2222 (circa 1964).

2N222I semiconductor manufactured by Allied Electronics, listed as 2N222I (circa 1964).

2N2220 semiconductor manufactured by Allied Electronics, listed as 2N2220 (circa 1964).