2N5243 semiconductor manufactured by Sylvania, listed as 2N5243 (circa 1979).

2N5242 semiconductor manufactured by Sylvania, listed as 2N5242 (circa 1979).

2N5241 semiconductor manufactured by Sylvania, listed as 2N5241 (circa 1979).

2N5240 semiconductor manufactured by Sylvania, listed as 2N5240 (circa 1979).

2N5239 semiconductor manufactured by Sylvania, listed as 2N5239 (circa 1979).

2N5235 semiconductor manufactured by Sylvania, listed as 2N5235 (circa 1979).

2N5234 semiconductor manufactured by Sylvania, listed as 2N5234 (circa 1979).

2N5233 semiconductor manufactured by Sylvania, listed as 2N5233 (circa 1979).

2N5232A semiconductor manufactured by Sylvania, listed as 2N5232A (circa 1979).

2N5232 semiconductor manufactured by Sylvania, listed as 2N5232 (circa 1979).

2N5230 semiconductor manufactured by Sylvania, listed as 2N5230 (circa 1979).

2N5228 semiconductor manufactured by Sylvania, listed as 2N5228 (circa 1979).

2N5227 semiconductor manufactured by Sylvania, listed as 2N5227 (circa 1979).

2N5226 semiconductor manufactured by Sylvania, listed as 2N5226 (circa 1979).

2N5225 semiconductor manufactured by Sylvania, listed as 2N5225 (circa 1979).

2N5224 semiconductor manufactured by Sylvania, listed as 2N5224 (circa 1979).

2N5223 semiconductor manufactured by Sylvania, listed as 2N5223 (circa 1979).

2N5222 semiconductor manufactured by Sylvania, listed as 2N5222 (circa 1979).

2N5221 semiconductor manufactured by Sylvania, listed as 2N5221 (circa 1979).

2N5220 semiconductor manufactured by Sylvania, listed as 2N5220 (circa 1979).