1N5373A semiconductor manufactured by Sylvania, listed as 1N5373A (circa 1979).

1N5334 semiconductor manufactured by Sylvania, listed as 1N5334 (circa 1979).

1N5247 semiconductor manufactured by Sylvania, listed as 1N5247 (circa 1979).

1N5140A semiconductor manufactured by Sylvania, listed as 1N5140A (circa 1979).

1N5738B semiconductor manufactured by Sylvania, listed as 1N5738B (circa 1979).

1N5573A semiconductor manufactured by Sylvania, listed as 1N5573A (circa 1979).

1N5523 semiconductor manufactured by Sylvania, listed as 1N5523 (circa 1979).

1N5373 semiconductor manufactured by Sylvania, listed as 1N5373 (circa 1979).

1N5333B semiconductor manufactured by Sylvania, listed as 1N5333B (circa 1979).

1N5246B semiconductor manufactured by Sylvania, listed as 1N5246B (circa 1979).

1N5896B semiconductor manufactured by Sylvania, listed as 1N5896B (circa 1979).

1N5140 semiconductor manufactured by Sylvania, listed as 1N5140 (circa 1979).

1N5139A semiconductor manufactured by Sylvania, listed as 1N5139A (circa 1979).

1N5029 semiconductor manufactured by Sylvania, listed as 1N5029 (circa 1979).

1N4910 semiconductor manufactured by Sylvania, listed as 1N4910 (circa 1979).

1N4835 semiconductor manufactured by Sylvania, listed as 1N4835 (circa 1979).

1N4731A semiconductor manufactured by Sylvania, listed as 1N4731A (circa 1979).

1N4618 semiconductor manufactured by Sylvania, listed as 1N4618 (circa 1979).

1N4430 semiconductor manufactured by Sylvania, listed as 1N4430 (circa 1979).

1N5139 semiconductor manufactured by Sylvania, listed as 1N5139 (circa 1979).