1N5128 semiconductor manufactured by Sylvania, listed as 1N5128 (circa 1979).

1N5025 semiconductor manufactured by Sylvania, listed as 1N5025 (circa 1979).

1N4906A semiconductor manufactured by Sylvania, listed as 1N4906A (circa 1979).

1N4832B semiconductor manufactured by Sylvania, listed as 1N4832B (circa 1979).

1N4728 semiconductor manufactured by Sylvania, listed as 1N4728 (circa 1979).

1N4583A semiconductor manufactured by Sylvania, listed as 1N4583A (circa 1979).

1N4427A semiconductor manufactured by Sylvania, listed as 1N4427A (circa 1979).

1N5127 semiconductor manufactured by Sylvania, listed as 1N5127 (circa 1979).

1N5024A semiconductor manufactured by Sylvania, listed as 1N5024A (circa 1979).

1N4906 semiconductor manufactured by Sylvania, listed as 1N4906 (circa 1979).

1N4832A semiconductor manufactured by Sylvania, listed as 1N4832A (circa 1979).

1N4727 semiconductor manufactured by Sylvania, listed as 1N4727 (circa 1979).

1N4583 semiconductor manufactured by Sylvania, listed as 1N4583 (circa 1979).

1N4427 semiconductor manufactured by Sylvania, listed as 1N4427 (circa 1979).

1N5126 semiconductor manufactured by Sylvania, listed as 1N5126 (circa 1979).

1N5024 semiconductor manufactured by Sylvania, listed as 1N5024 (circa 1979).

1N4905A semiconductor manufactured by Sylvania, listed as 1N4905A (circa 1979).

1N4832 semiconductor manufactured by Sylvania, listed as 1N4832 (circa 1979).

1N4726 semiconductor manufactured by Sylvania, listed as 1N4726 (circa 1979).

1N4556A semiconductor manufactured by Sylvania, listed as 1N4556A (circa 1979).