1N340R semiconductor manufactured by Allied Electronics, listed as 1N340R (circa 1964).

1N340 semiconductor manufactured by Allied Electronics, listed as 1N340 (circa 1964).

1N339R semiconductor manufactured by Allied Electronics, listed as 1N339R (circa 1964).

1N339 semiconductor manufactured by Allied Electronics, listed as 1N339 (circa 1964).

1N338R semiconductor manufactured by Allied Electronics, listed as 1N338R (circa 1964).

1N338 semiconductor manufactured by Allied Electronics, listed as 1N338 (circa 1964).

1N337R semiconductor manufactured by Allied Electronics, listed as 1N337R (circa 1964).

1N337 semiconductor manufactured by Allied Electronics, listed as 1N337 (circa 1964).

1N336R semiconductor manufactured by Allied Electronics, listed as 1N336R (circa 1964).

1N336 semiconductor manufactured by Allied Electronics, listed as 1N336 (circa 1964).

1N335R semiconductor manufactured by Allied Electronics, listed as 1N335R (circa 1964).

1N335 semiconductor manufactured by Allied Electronics, listed as 1N335 (circa 1964).

1N334R semiconductor manufactured by Allied Electronics, listed as 1N334R (circa 1964).

1N334 semiconductor manufactured by Allied Electronics, listed as 1N334 (circa 1964).

1N333 semiconductor manufactured by Allied Electronics, listed as 1N333 (circa 1964).

1N332 semiconductor manufactured by Allied Electronics, listed as 1N332 (circa 1964).

1N315 semiconductor manufactured by Allied Electronics, listed as 1N315 (circa 1964).

1N307 semiconductor manufactured by Allied Electronics, listed as 1N307 (circa 1964).

1N306 semiconductor manufactured by Allied Electronics, listed as 1N306 (circa 1964).

1N305 semiconductor manufactured by Allied Electronics, listed as 1N305 (circa 1964).