1N4712 semiconductor manufactured by Sylvania, listed as 1N4712 (circa 1979).

1N4549 semiconductor manufactured by Sylvania, listed as 1N4549 (circa 1979).

1N4421A semiconductor manufactured by Sylvania, listed as 1N4421A (circa 1979).

1N5097 semiconductor manufactured by Sylvania, listed as 1N5097 (circa 1979).

1N5015A semiconductor manufactured by Sylvania, listed as 1N5015A (circa 1979).

1N4897A semiconductor manufactured by Sylvania, listed as 1N4897A (circa 1979).

1N4801A semiconductor manufactured by Sylvania, listed as 1N4801A (circa 1979).

1N4711 semiconductor manufactured by Sylvania, listed as 1N4711 (circa 1979).

1N4421 semiconductor manufactured by Sylvania, listed as 1N4421 (circa 1979).

1N5096 semiconductor manufactured by Sylvania, listed as 1N5096 (circa 1979).

1N5015 semiconductor manufactured by Sylvania, listed as 1N5015 (circa 1979).

1N4897 semiconductor manufactured by Sylvania, listed as 1N4897 (circa 1979).

1N4801 semiconductor manufactured by Sylvania, listed as 1N4801 (circa 1979).

1N4710 semiconductor manufactured by Sylvania, listed as 1N4710 (circa 1979).

1N4547 semiconductor manufactured by Sylvania, listed as 1N4547 (circa 1979).

1N4420B semiconductor manufactured by Sylvania, listed as 1N4420B (circa 1979).

1N5095 semiconductor manufactured by Sylvania, listed as 1N5095 (circa 1979).

1N5014A semiconductor manufactured by Sylvania, listed as 1N5014A (circa 1979).

1N4896A semiconductor manufactured by Sylvania, listed as 1N4896A (circa 1979).

1N4794A semiconductor manufactured by Sylvania, listed as 1N4794A (circa 1979).