1N4413A semiconductor manufactured by Sylvania, listed as 1N4413A (circa 1979).

1N5073 semiconductor manufactured by Sylvania, listed as 1N5073 (circa 1979).

1N5000 semiconductor manufactured by Sylvania, listed as 1N5000 (circa 1979).

1N4858 semiconductor manufactured by Sylvania, listed as 1N4858 (circa 1979).

1N4765 semiconductor manufactured by Sylvania, listed as 1N4765 (circa 1979).

1N4688 semiconductor manufactured by Sylvania, listed as 1N4688 (circa 1979).

1N4502 semiconductor manufactured by Sylvania, listed as 1N4502 (circa 1979).

1N4413 semiconductor manufactured by Sylvania, listed as 1N4413 (circa 1979).

1N5072 semiconductor manufactured by Sylvania, listed as 1N5072 (circa 1979).

1N4999 semiconductor manufactured by Sylvania, listed as 1N4999 (circa 1979).

1N4857B semiconductor manufactured by Sylvania, listed as 1N4857B (circa 1979).

1N4764A semiconductor manufactured by Sylvania, listed as 1N4764A (circa 1979).

1N4687 semiconductor manufactured by Sylvania, listed as 1N4687 (circa 1979).

1N4501 semiconductor manufactured by Sylvania, listed as 1N4501 (circa 1979).

1N4412B semiconductor manufactured by Sylvania, listed as 1N4412B (circa 1979).

1N5071 semiconductor manufactured by Sylvania, listed as 1N5071 (circa 1979).

1N4998 semiconductor manufactured by Sylvania, listed as 1N4998 (circa 1979).

1N4857A semiconductor manufactured by Sylvania, listed as 1N4857A (circa 1979).

1N4764 semiconductor manufactured by Sylvania, listed as 1N4764 (circa 1979).

1N4686 semiconductor manufactured by Sylvania, listed as 1N4686 (circa 1979).