1N4683 semiconductor manufactured by Sylvania, listed as 1N4683 (circa 1979).

1N4494 semiconductor manufactured by Sylvania, listed as 1N4494 (circa 1979).

1N4411A semiconductor manufactured by Sylvania, listed as 1N4411A (circa 1979).

1N5067 semiconductor manufactured by Sylvania, listed as 1N5067 (circa 1979).

1N4988 semiconductor manufactured by Sylvania, listed as 1N4988 (circa 1979).

1N4856 semiconductor manufactured by Sylvania, listed as 1N4856 (circa 1979).

1N4762 semiconductor manufactured by Sylvania, listed as 1N4762 (circa 1979).

1N4682 semiconductor manufactured by Sylvania, listed as 1N4682 (circa 1979).

1N4493 semiconductor manufactured by Sylvania, listed as 1N4493 (circa 1979).

1N4411 semiconductor manufactured by Sylvania, listed as 1N4411 (circa 1979).

1N5066 semiconductor manufactured by Sylvania, listed as 1N5066 (circa 1979).

1N4987 semiconductor manufactured by Sylvania, listed as 1N4987 (circa 1979).

1N4855B semiconductor manufactured by Sylvania, listed as 1N4855B (circa 1979).

1N4761A semiconductor manufactured by Sylvania, listed as 1N4761A (circa 1979).

1N4681 semiconductor manufactured by Sylvania, listed as 1N4681 (circa 1979).

1N4492 semiconductor manufactured by Sylvania, listed as 1N4492 (circa 1979).

1N4410B semiconductor manufactured by Sylvania, listed as 1N4410B (circa 1979).

1N5065 semiconductor manufactured by Sylvania, listed as 1N5065 (circa 1979).

1N4986 semiconductor manufactured by Sylvania, listed as 1N4986 (circa 1979).

1N4855A semiconductor manufactured by Sylvania, listed as 1N4855A (circa 1979).