2N6151 semiconductor manufactured by Sylvania, listed as 2N6151 (circa 1979).

2N6146 semiconductor manufactured by Sylvania, listed as 2N6146 (circa 1979).

2N6141 semiconductor manufactured by Sylvania, listed as 2N6141 (circa 1979).

2N6140 semiconductor manufactured by Sylvania, listed as 2N6140 (circa 1979).

2N6139 semiconductor manufactured by Sylvania, listed as 2N6139 (circa 1979).

2N6134 semiconductor manufactured by Sylvania, listed as 2N6134 (circa 1979).

2N6133 semiconductor manufactured by Sylvania, listed as 2N6133 (circa 1979).

2N6132 semiconductor manufactured by Sylvania, listed as 2N6132 (circa 1979).

2N6126 semiconductor manufactured by Sylvania, listed as 2N6126 (circa 1979).

2N6125 semiconductor manufactured by Sylvania, listed as 2N6125 (circa 1979).

2N6124 semiconductor manufactured by Sylvania, listed as 2N6124 (circa 1979).

2N6123 semiconductor manufactured by Sylvania, listed as 2N6123 (circa 1979).

2N6122 semiconductor manufactured by Sylvania, listed as 2N6122 (circa 1979).

2N6121 semiconductor manufactured by Sylvania, listed as 2N6121 (circa 1979).

2N6111 semiconductor manufactured by Sylvania, listed as 2N6111 (circa 1979).

2N6110 semiconductor manufactured by Sylvania, listed as 2N6110 (circa 1979).

2N6109 semiconductor manufactured by Sylvania, listed as 2N6109 (circa 1979).

2N6108 semiconductor manufactured by Sylvania, listed as 2N6108 (circa 1979).

2N6107 semiconductor manufactured by Sylvania, listed as 2N6107 (circa 1979).

2N6106 semiconductor manufactured by Sylvania, listed as 2N6106 (circa 1979).