2N263 semiconductor manufactured by Sylvania, listed as 2N263 (circa 1979).

2N526A semiconductor manufactured by Sylvania, listed as 2N526A (circa 1979).

2N444A semiconductor manufactured by Sylvania, listed as 2N444A (circa 1979).

2N358 semiconductor manufactured by Sylvania, listed as 2N358 (circa 1979).

2N262 semiconductor manufactured by Sylvania, listed as 2N262 (circa 1979).

2N176M semiconductor manufactured by Sylvania, listed as 2N176M (circa 1979).

2N526 semiconductor manufactured by Sylvania, listed as 2N526 (circa 1979).

2N444 semiconductor manufactured by Sylvania, listed as 2N444 (circa 1979).

2N357A semiconductor manufactured by Sylvania, listed as 2N357A (circa 1979).

2N257W semiconductor manufactured by Sylvania, listed as 2N257W (circa 1979).

2N525A semiconductor manufactured by Sylvania, listed as 2N525A (circa 1979).

2N443 semiconductor manufactured by Sylvania, listed as 2N443 (circa 1979).

2N357 semiconductor manufactured by Sylvania, listed as 2N357 (circa 1979).

2N257G semiconductor manufactured by Sylvania, listed as 2N257G (circa 1979).

2N176G semiconductor manufactured by Sylvania, listed as 2N176G (circa 1979).

2N525 semiconductor manufactured by Sylvania, listed as 2N525 (circa 1979).

2N442 semiconductor manufactured by Sylvania, listed as 2N442 (circa 1979).

2N356A semiconductor manufactured by Sylvania, listed as 2N356A (circa 1979).

2N257B semiconductor manufactured by Sylvania, listed as 2N257B (circa 1979).

2N524A semiconductor manufactured by Sylvania, listed as 2N524A (circa 1979).