2N459A semiconductor manufactured by Sylvania, listed as 2N459A (circa 1979).

2N373 semiconductor manufactured by Sylvania, listed as 2N373 (circa 1979).

2N278 semiconductor manufactured by Sylvania, listed as 2N278 (circa 1979).

2N187 semiconductor manufactured by Sylvania, listed as 2N187 (circa 1979).

2N111B semiconductor manufactured by Sylvania, listed as 2N111B (circa 1979).

2N541 semiconductor manufactured by Sylvania, listed as 2N541 (circa 1979).

2N459 semiconductor manufactured by Sylvania, listed as 2N459 (circa 1979).

2N277 semiconductor manufactured by Sylvania, listed as 2N277 (circa 1979).

2N186A semiconductor manufactured by Sylvania, listed as 2N186A (circa 1979).

2N111A semiconductor manufactured by Sylvania, listed as 2N111A (circa 1979).

2N540A semiconductor manufactured by Sylvania, listed as 2N540A (circa 1979).

2N4588 semiconductor manufactured by Sylvania, listed as 2N4588 (circa 1979).

2N372 semiconductor manufactured by Sylvania, listed as 2N372 (circa 1979).

2N276 semiconductor manufactured by Sylvania, listed as 2N276 (circa 1979).

2N186 semiconductor manufactured by Sylvania, listed as 2N186 (circa 1979).

2N111 semiconductor manufactured by Sylvania, listed as 2N111 (circa 1979).

2N540 semiconductor manufactured by Sylvania, listed as 2N540 (circa 1979).

2N458A semiconductor manufactured by Sylvania, listed as 2N458A (circa 1979).

2N275 semiconductor manufactured by Sylvania, listed as 2N275 (circa 1979).

2N539A semiconductor manufactured by Sylvania, listed as 2N539A (circa 1979).