2N387 semiconductor manufactured by Sylvania, listed as 2N387 (circa 1979).

2N297 semiconductor manufactured by Sylvania, listed as 2N297 (circa 1979).

2N205 semiconductor manufactured by Sylvania, listed as 2N205 (circa 1979).

2N128 semiconductor manufactured by Sylvania, listed as 2N128 (circa 1979).

2N557 semiconductor manufactured by Sylvania, listed as 2N557 (circa 1979).

2N475 semiconductor manufactured by Sylvania, listed as 2N475 (circa 1979).

2N386 semiconductor manufactured by Sylvania, listed as 2N386 (circa 1979).

2N296 semiconductor manufactured by Sylvania, listed as 2N296 (circa 1979).

2N204 semiconductor manufactured by Sylvania, listed as 2N204 (circa 1979).

2N127 semiconductor manufactured by Sylvania, listed as 2N127 (circa 1979).

2N556 semiconductor manufactured by Sylvania, listed as 2N556 (circa 1979).

2N474A semiconductor manufactured by Sylvania, listed as 2N474A (circa 1979).

2N385A semiconductor manufactured by Sylvania, listed as 2N385A (circa 1979).

2N293 semiconductor manufactured by Sylvania, listed as 2N293 (circa 1979).

2N126 semiconductor manufactured by Sylvania, listed as 2N126 (circa 1979).

2N555 semiconductor manufactured by Sylvania, listed as 2N555 (circa 1979).

2N474 semiconductor manufactured by Sylvania, listed as 2N474 (circa 1979).

2N385 semiconductor manufactured by Sylvania, listed as 2N385 (circa 1979).

2N292A semiconductor manufactured by Sylvania, listed as 2N292A (circa 1979).

2N199 semiconductor manufactured by Sylvania, listed as 2N199 (circa 1979).