2N160A semiconductor manufactured by Sylvania, listed as 2N160A (circa 1979).

2N503 semiconductor manufactured by Sylvania, listed as 2N503 (circa 1979).

2N410 semiconductor manufactured by Sylvania, listed as 2N410 (circa 1979).

2N327A semiconductor manufactured by Sylvania, listed as 2N327A (circa 1979).

2N233A semiconductor manufactured by Sylvania, listed as 2N233A (circa 1979).

2N160 semiconductor manufactured by Sylvania, listed as 2N160 (circa 1979).

2N502B semiconductor manufactured by Sylvania, listed as 2N502B (circa 1979).

2N409 semiconductor manufactured by Sylvania, listed as 2N409 (circa 1979).

2N327 semiconductor manufactured by Sylvania, listed as 2N327 (circa 1979).

2N233 semiconductor manufactured by Sylvania, listed as 2N233 (circa 1979).

2N159 semiconductor manufactured by Sylvania, listed as 2N159 (circa 1979).

2N502A semiconductor manufactured by Sylvania, listed as 2N502A (circa 1979).

2N325 semiconductor manufactured by Sylvania, listed as 2N325 (circa 1979).

2N232 semiconductor manufactured by Sylvania, listed as 2N232 (circa 1979).

2N157A semiconductor manufactured by Sylvania, listed as 2N157A (circa 1979).

2N502 semiconductor manufactured by Sylvania, listed as 2N502 (circa 1979).

2N408J semiconductor manufactured by Sylvania, listed as 2N408J (circa 1979).

2N324 semiconductor manufactured by Sylvania, listed as 2N324 (circa 1979).

2N231 semiconductor manufactured by Sylvania, listed as 2N231 (circa 1979).

2N157 semiconductor manufactured by Sylvania, listed as 2N157 (circa 1979).