2N336A semiconductor manufactured by Sylvania, listed as 2N336A (circa 1979).

2N248 semiconductor manufactured by Sylvania, listed as 2N248 (circa 1979).

2N174 semiconductor manufactured by Sylvania, listed as 2N174 (circa 1979).

2N515 semiconductor manufactured by Sylvania, listed as 2N515 (circa 1979).

2N426 semiconductor manufactured by Sylvania, listed as 2N426 (circa 1979).

2N336 semiconductor manufactured by Sylvania, listed as 2N336 (circa 1979).

2N173 semiconductor manufactured by Sylvania, listed as 2N173 (circa 1979).

2N514B semiconductor manufactured by Sylvania, listed as 2N514B (circa 1979).

2N425 semiconductor manufactured by Sylvania, listed as 2N425 (circa 1979).

2N335B semiconductor manufactured by Sylvania, listed as 2N335B (circa 1979).

2N247 semiconductor manufactured by Sylvania, listed as 2N247 (circa 1979).

2N172 semiconductor manufactured by Sylvania, listed as 2N172 (circa 1979).

2N514A semiconductor manufactured by Sylvania, listed as 2N514A (circa 1979).

2N422A semiconductor manufactured by Sylvania, listed as 2N422A (circa 1979).

2N335A semiconductor manufactured by Sylvania, listed as 2N335A (circa 1979).

2N242 semiconductor manufactured by Sylvania, listed as 2N242 (circa 1979).

2N170 semiconductor manufactured by Sylvania, listed as 2N170 (circa 1979).

2N514 semiconductor manufactured by Sylvania, listed as 2N514 (circa 1979).

2N422 semiconductor manufactured by Sylvania, listed as 2N422 (circa 1979).

2N335 semiconductor manufactured by Sylvania, listed as 2N335 (circa 1979).