2N217 semiconductor manufactured by Sylvania, listed as 2N217 (circa 1979).

2N138A semiconductor manufactured by Sylvania, listed as 2N138A (circa 1979).

2N572 semiconductor manufactured by Sylvania, listed as 2N572 (circa 1979).

2N483B semiconductor manufactured by Sylvania, listed as 2N483B (circa 1979).

2N401 semiconductor manufactured by Sylvania, listed as 2N401 (circa 1979).

2N307B semiconductor manufactured by Sylvania, listed as 2N307B (circa 1979).

2N216 semiconductor manufactured by Sylvania, listed as 2N216 (circa 1979).

2N138 semiconductor manufactured by Sylvania, listed as 2N138 (circa 1979).

2N571 semiconductor manufactured by Sylvania, listed as 2N571 (circa 1979).

2N400 semiconductor manufactured by Sylvania, listed as 2N400 (circa 1979).

2N307A semiconductor manufactured by Sylvania, listed as 2N307A (circa 1979).

2N215 semiconductor manufactured by Sylvania, listed as 2N215 (circa 1979).

2N137 semiconductor manufactured by Sylvania, listed as 2N137 (circa 1979).

2N570 semiconductor manufactured by Sylvania, listed as 2N570 (circa 1979).

2N483 semiconductor manufactured by Sylvania, listed as 2N483 (circa 1979).

2N399 semiconductor manufactured by Sylvania, listed as 2N399 (circa 1979).

2N306A semiconductor manufactured by Sylvania, listed as 2N306A (circa 1979).

2N214A semiconductor manufactured by Sylvania, listed as 2N214A (circa 1979).

2N136 semiconductor manufactured by Sylvania, listed as 2N136 (circa 1979).

2N569 semiconductor manufactured by Sylvania, listed as 2N569 (circa 1979).