2N125 semiconductor manufactured by Sylvania, listed as 2N125 (circa 1979).

2N554 semiconductor manufactured by Sylvania, listed as 2N554 (circa 1979).

2N473 semiconductor manufactured by Sylvania, listed as 2N473 (circa 1979).

2N292 semiconductor manufactured by Sylvania, listed as 2N292 (circa 1979).

2N198 semiconductor manufactured by Sylvania, listed as 2N198 (circa 1979).

2N124 semiconductor manufactured by Sylvania, listed as 2N124 (circa 1979).

2N553 semiconductor manufactured by Sylvania, listed as 2N553 (circa 1979).

2N472A semiconductor manufactured by Sylvania, listed as 2N472A (circa 1979).

2N384 semiconductor manufactured by Sylvania, listed as 2N384 (circa 1979).

2N291 semiconductor manufactured by Sylvania, listed as 2N291 (circa 1979).

2N197 semiconductor manufactured by Sylvania, listed as 2N197 (circa 1979).

2N123A semiconductor manufactured by Sylvania, listed as 2N123A (circa 1979).

2N552 semiconductor manufactured by Sylvania, listed as 2N552 (circa 1979).

2N472 semiconductor manufactured by Sylvania, listed as 2N472 (circa 1979).

2N383 semiconductor manufactured by Sylvania, listed as 2N383 (circa 1979).

2N290 semiconductor manufactured by Sylvania, listed as 2N290 (circa 1979).

2N196 semiconductor manufactured by Sylvania, listed as 2N196 (circa 1979).

2N123 semiconductor manufactured by Sylvania, listed as 2N123 (circa 1979).

2N551 semiconductor manufactured by Sylvania, listed as 2N551 (circa 1979).

2N471A semiconductor manufactured by Sylvania, listed as 2N471A (circa 1979).