1N4968 semiconductor manufactured by Sylvania, listed as 1N4968 (circa 1979).

1N4849 semiconductor manufactured by Sylvania, listed as 1N4849 (circa 1979).

1N4752 semiconductor manufactured by Sylvania, listed as 1N4752 (circa 1979).

1N4659 semiconductor manufactured by Sylvania, listed as 1N4659 (circa 1979).

1N4473 semiconductor manufactured by Sylvania, listed as 1N4473 (circa 1979).

1N4404 semiconductor manufactured by Sylvania, listed as 1N4404 (circa 1979).

1N5050 semiconductor manufactured by Sylvania, listed as 1N5050 (circa 1979).

1N4967 semiconductor manufactured by Sylvania, listed as 1N4967 (circa 1979).

1N4848B semiconductor manufactured by Sylvania, listed as 1N4848B (circa 1979).

1N4751A semiconductor manufactured by Sylvania, listed as 1N4751A (circa 1979).

1N4658 semiconductor manufactured by Sylvania, listed as 1N4658 (circa 1979).

1N4472 semiconductor manufactured by Sylvania, listed as 1N4472 (circa 1979).

1N4403B semiconductor manufactured by Sylvania, listed as 1N4403B (circa 1979).

1N5049 semiconductor manufactured by Sylvania, listed as 1N5049 (circa 1979).

1N4966 semiconductor manufactured by Sylvania, listed as 1N4966 (circa 1979).

1N4848A semiconductor manufactured by Sylvania, listed as 1N4848A (circa 1979).

1N4751 semiconductor manufactured by Sylvania, listed as 1N4751 (circa 1979).

1N4657 semiconductor manufactured by Sylvania, listed as 1N4657 (circa 1979).

1N4471 semiconductor manufactured by Sylvania, listed as 1N4471 (circa 1979).

1N4403A semiconductor manufactured by Sylvania, listed as 1N4403A (circa 1979).