2N492B semiconductor manufactured by Allied Electronics, listed as 2N492B (circa 1964).

2N492A semiconductor manufactured by Allied Electronics, listed as 2N492A (circa 1964).

2N490B semiconductor manufactured by Allied Electronics, listed as 2N490B (circa 1964).

2N489B semiconductor manufactured by Allied Electronics, listed as 2N489B (circa 1964).

2N494 semiconductor manufactured by Allied Electronics, listed as 2N494 (circa 1964).

2N493 semiconductor manufactured by Allied Electronics, listed as 2N493 (circa 1964).

2N492 semiconductor manufactured by Allied Electronics, listed as 2N492 (circa 1964).

2N490 semiconductor manufactured by Allied Electronics, listed as 2N490 (circa 1964).

2N489 semiconductor manufactured by Allied Electronics, listed as 2N489 (circa 1964).

2N2388 semiconductor manufactured by Allied Electronics, listed as 2N2388 (circa 1964).

2N2387 semiconductor manufactured by Allied Electronics, listed as 2N2387 (circa 1964).

2N760A semiconductor manufactured by Allied Electronics, listed as 2N760A (circa 1964).

2N760 semiconductor manufactured by Allied Electronics, listed as 2N760 (circa 1964).

2N740 semiconductor manufactured by Allied Electronics, listed as 2N740 (circa 1964).

2N739 semiconductor manufactured by Allied Electronics, listed as 2N739 (circa 1964).

2N738 semiconductor manufactured by Allied Electronics, listed as 2N738 (circa 1964).

2N736A semiconductor manufactured by Allied Electronics, listed as 2N736A (circa 1964).

2N736 semiconductor manufactured by Allied Electronics, listed as 2N736 (circa 1964).

2N735 semiconductor manufactured by Allied Electronics, listed as 2N735 (circa 1964).

2N734 semiconductor manufactured by Allied Electronics, listed as 2N734 (circa 1964).