1N5619 semiconductor manufactured by Sylvania, listed as 1N5619 (circa 1979).

1N5413 semiconductor manufactured by Sylvania, listed as 1N5413 (circa 1979).

1N5358 semiconductor manufactured by Sylvania, listed as 1N5358 (circa 1979).

1N5270A semiconductor manufactured by Sylvania, listed as 1N5270A (circa 1979).

1N5231B semiconductor manufactured by Sylvania, listed as 1N5231B (circa 1979).

1N5856B semiconductor manufactured by Sylvania, listed as 1N5856B (circa 1979).

1N5618 semiconductor manufactured by Sylvania, listed as 1N5618 (circa 1979).

1N5412 semiconductor manufactured by Sylvania, listed as 1N5412 (circa 1979).

1N5357B semiconductor manufactured by Sylvania, listed as 1N5357B (circa 1979).

1N5270 semiconductor manufactured by Sylvania, listed as 1N5270 (circa 1979).

1N5231A semiconductor manufactured by Sylvania, listed as 1N5231A (circa 1979).

1N5855B semiconductor manufactured by Sylvania, listed as 1N5855B (circa 1979).

1N5617 semiconductor manufactured by Sylvania, listed as 1N5617 (circa 1979).

1N5552 semiconductor manufactured by Sylvania, listed as 1N5552 (circa 1979).

1N5411 semiconductor manufactured by Sylvania, listed as 1N5411 (circa 1979).

1N5357A semiconductor manufactured by Sylvania, listed as 1N5357A (circa 1979).

1N5269B semiconductor manufactured by Sylvania, listed as 1N5269B (circa 1979).

1N5231 semiconductor manufactured by Sylvania, listed as 1N5231 (circa 1979).

1N5855A semiconductor manufactured by Sylvania, listed as 1N5855A (circa 1979).

1N5616 semiconductor manufactured by Sylvania, listed as 1N5616 (circa 1979).