2N5163 semiconductor manufactured by Sylvania, listed as 2N5163 (circa 1979).

2N5160 semiconductor manufactured by Sylvania, listed as 2N5160 (circa 1979).

2N5157 semiconductor manufactured by Sylvania, listed as 2N5157 (circa 1979).

2N5156 semiconductor manufactured by Sylvania, listed as 2N5156 (circa 1979).

2N5143 semiconductor manufactured by Sylvania, listed as 2N5143 (circa 1979).

2N5142 semiconductor manufactured by Sylvania, listed as 2N5142 (circa 1979).

2N5141 semiconductor manufactured by Sylvania, listed as 2N5141 (circa 1979).

2N5140 semiconductor manufactured by Sylvania, listed as 2N5140 (circa 1979).

2N5139 semiconductor manufactured by Sylvania, listed as 2N5139 (circa 1979).

2N5138 semiconductor manufactured by Sylvania, listed as 2N5138 (circa 1979).

2N5137 semiconductor manufactured by Sylvania, listed as 2N5137 (circa 1979).

2N5136 semiconductor manufactured by Sylvania, listed as 2N5136 (circa 1979).

2N5135 semiconductor manufactured by Sylvania, listed as 2N5135 (circa 1979).

2N5134 semiconductor manufactured by Sylvania, listed as 2N5134 (circa 1979).

2N5133 semiconductor manufactured by Sylvania, listed as 2N5133 (circa 1979).

2N5132 semiconductor manufactured by Sylvania, listed as 2N5132 (circa 1979).

2N5131 semiconductor manufactured by Sylvania, listed as 2N5131 (circa 1979).

2N5130 semiconductor manufactured by Sylvania, listed as 2N5130 (circa 1979).

2N5129 semiconductor manufactured by Sylvania, listed as 2N5129 (circa 1979).

2N5128 semiconductor manufactured by Sylvania, listed as 2N5128 (circa 1979).