1N4759A semiconductor manufactured by Sylvania, listed as 1N4759A (circa 1979).

1N4674 semiconductor manufactured by Sylvania, listed as 1N4674 (circa 1979).

1N4488 semiconductor manufactured by Sylvania, listed as 1N4488 (circa 1979).

1N4409 semiconductor manufactured by Sylvania, listed as 1N4409 (circa 1979).

1N5062 semiconductor manufactured by Sylvania, listed as 1N5062 (circa 1979).

1N4982 semiconductor manufactured by Sylvania, listed as 1N4982 (circa 1979).

1N4854 semiconductor manufactured by Sylvania, listed as 1N4854 (circa 1979).

1N4759 semiconductor manufactured by Sylvania, listed as 1N4759 (circa 1979).

1N4673 semiconductor manufactured by Sylvania, listed as 1N4673 (circa 1979).

1N4487 semiconductor manufactured by Sylvania, listed as 1N4487 (circa 1979).

1N4408B semiconductor manufactured by Sylvania, listed as 1N4408B (circa 1979).

1N5061 semiconductor manufactured by Sylvania, listed as 1N5061 (circa 1979).

1N4981 semiconductor manufactured by Sylvania, listed as 1N4981 (circa 1979).

1N4853B semiconductor manufactured by Sylvania, listed as 1N4853B (circa 1979).

1N4758A semiconductor manufactured by Sylvania, listed as 1N4758A (circa 1979).

1N4672 semiconductor manufactured by Sylvania, listed as 1N4672 (circa 1979).

1N4486 semiconductor manufactured by Sylvania, listed as 1N4486 (circa 1979).

1N4408A semiconductor manufactured by Sylvania, listed as 1N4408A (circa 1979).

1N5060 semiconductor manufactured by Sylvania, listed as 1N5060 (circa 1979).

1N4980 semiconductor manufactured by Sylvania, listed as 1N4980 (circa 1979).