2N729 semiconductor manufactured by Sylvania, listed as 2N729 (circa 1979).

2N642 semiconductor manufactured by Sylvania, listed as 2N642 (circa 1979).

2N1357 semiconductor manufactured by Sylvania, listed as 2N1357 (circa 1979).

2N1221 semiconductor manufactured by Sylvania, listed as 2N1221 (circa 1979).

2N850 semiconductor manufactured by Sylvania, listed as 2N850 (circa 1979).

2N728 semiconductor manufactured by Sylvania, listed as 2N728 (circa 1979).

2N1356 semiconductor manufactured by Sylvania, listed as 2N1356 (circa 1979).

2N1220 semiconductor manufactured by Sylvania, listed as 2N1220 (circa 1979).

2N1122 semiconductor manufactured by Sylvania, listed as 2N1122 (circa 1979).

2N999 semiconductor manufactured by Sylvania, listed as 2N999 (circa 1979).

2N849 semiconductor manufactured by Sylvania, listed as 2N849 (circa 1979).

2N727 semiconductor manufactured by Sylvania, listed as 2N727 (circa 1979).

2N641 semiconductor manufactured by Sylvania, listed as 2N641 (circa 1979).

2N1355 semiconductor manufactured by Sylvania, listed as 2N1355 (circa 1979).

2N1219 semiconductor manufactured by Sylvania, listed as 2N1219 (circa 1979).

2N998 semiconductor manufactured by Sylvania, listed as 2N998 (circa 1979).

2N846B semiconductor manufactured by Sylvania, listed as 2N846B (circa 1979).

2N726 semiconductor manufactured by Sylvania, listed as 2N726 (circa 1979).

2N640 semiconductor manufactured by Sylvania, listed as 2N640 (circa 1979).

2N1354 semiconductor manufactured by Sylvania, listed as 2N1354 (circa 1979).