2N3250A semiconductor manufactured by Sylvania, listed as 2N3250A (circa 1979).

2N3250 semiconductor manufactured by Sylvania, listed as 2N3250 (circa 1979).

2N3249 semiconductor manufactured by Sylvania, listed as 2N3249 (circa 1979).

2N3248 semiconductor manufactured by Sylvania, listed as 2N3248 (circa 1979).

2N3247 semiconductor manufactured by Sylvania, listed as 2N3247 (circa 1979).

2N3246 semiconductor manufactured by Sylvania, listed as 2N3246 (circa 1979).

2N3245 semiconductor manufactured by Sylvania, listed as 2N3245 (circa 1979).

2N3242A semiconductor manufactured by Sylvania, listed as 2N3242A (circa 1979).

2N3242 semiconductor manufactured by Sylvania, listed as 2N3242 (circa 1979).

2N3241A semiconductor manufactured by Sylvania, listed as 2N3241A (circa 1979).

2N3241 semiconductor manufactured by Sylvania, listed as 2N3241 (circa 1979).

2N3234 semiconductor manufactured by Sylvania, listed as 2N3234 (circa 1979).

2N3233 semiconductor manufactured by Sylvania, listed as 2N3233 (circa 1979).

2N3232 semiconductor manufactured by Sylvania, listed as 2N3232 (circa 1979).

2N3228 semiconductor manufactured by Sylvania, listed as 2N3228 (circa 1979).

2N3227 semiconductor manufactured by Sylvania, listed as 2N3227 (circa 1979).

2N3226 semiconductor manufactured by Sylvania, listed as 2N3226 (circa 1979).

2N3219 semiconductor manufactured by Sylvania, listed as 2N3219 (circa 1979).

2N3218 semiconductor manufactured by Sylvania, listed as 2N3218 (circa 1979).

2N3217 semiconductor manufactured by Sylvania, listed as 2N3217 (circa 1979).