2N662 semiconductor manufactured by Sylvania, listed as 2N662 (circa 1979).

2N1384 semiconductor manufactured by Sylvania, listed as 2N1384 (circa 1979).

2N1251 semiconductor manufactured by Sylvania, listed as 2N1251 (circa 1979).

2N1143 semiconductor manufactured by Sylvania, listed as 2N1143 (circa 1979).

2N1028 semiconductor manufactured by Sylvania, listed as 2N1028 (circa 1979).

2N911 semiconductor manufactured by Sylvania, listed as 2N911 (circa 1979).

2N757A semiconductor manufactured by Sylvania, listed as 2N757A (circa 1979).

2N661 semiconductor manufactured by Sylvania, listed as 2N661 (circa 1979).

2N1383 semiconductor manufactured by Sylvania, listed as 2N1383 (circa 1979).

2N1249 semiconductor manufactured by Sylvania, listed as 2N1249 (circa 1979).

2N1142A semiconductor manufactured by Sylvania, listed as 2N1142A (circa 1979).

2N1027 semiconductor manufactured by Sylvania, listed as 2N1027 (circa 1979).

2N910 semiconductor manufactured by Sylvania, listed as 2N910 (circa 1979).

2N757 semiconductor manufactured by Sylvania, listed as 2N757 (circa 1979).

2N660 semiconductor manufactured by Sylvania, listed as 2N660 (circa 1979).

2N1382 semiconductor manufactured by Sylvania, listed as 2N1382 (circa 1979).

2N1248 semiconductor manufactured by Sylvania, listed as 2N1248 (circa 1979).

2N1142 semiconductor manufactured by Sylvania, listed as 2N1142 (circa 1979).

2N1026A semiconductor manufactured by Sylvania, listed as 2N1026A (circa 1979).

2N909 semiconductor manufactured by Sylvania, listed as 2N909 (circa 1979).