1N4977 semiconductor manufactured by Sylvania, listed as 1N4977 (circa 1979).

1N4852A semiconductor manufactured by Sylvania, listed as 1N4852A (circa 1979).

1N4756A semiconductor manufactured by Sylvania, listed as 1N4756A (circa 1979).

1N4668 semiconductor manufactured by Sylvania, listed as 1N4668 (circa 1979).

1N4482 semiconductor manufactured by Sylvania, listed as 1N4482 (circa 1979).

1N4407 semiconductor manufactured by Sylvania, listed as 1N4407 (circa 1979).

1N5056 semiconductor manufactured by Sylvania, listed as 1N5056 (circa 1979).

1N4976 semiconductor manufactured by Sylvania, listed as 1N4976 (circa 1979).

1N4756 semiconductor manufactured by Sylvania, listed as 1N4756 (circa 1979).

1N4667 semiconductor manufactured by Sylvania, listed as 1N4667 (circa 1979).

1N4481 semiconductor manufactured by Sylvania, listed as 1N4481 (circa 1979).

1N4406B semiconductor manufactured by Sylvania, listed as 1N4406B (circa 1979).

1N5055 semiconductor manufactured by Sylvania, listed as 1N5055 (circa 1979).

1N4975 semiconductor manufactured by Sylvania, listed as 1N4975 (circa 1979).

1N4851A semiconductor manufactured by Sylvania, listed as 1N4851A (circa 1979).

1N4755A semiconductor manufactured by Sylvania, listed as 1N4755A (circa 1979).

1N4666 semiconductor manufactured by Sylvania, listed as 1N4666 (circa 1979).

1N4480 semiconductor manufactured by Sylvania, listed as 1N4480 (circa 1979).

1N4406A semiconductor manufactured by Sylvania, listed as 1N4406A (circa 1979).

1N5054A semiconductor manufactured by Sylvania, listed as 1N5054A (circa 1979).