1N5244 semiconductor manufactured by Sylvania, listed as 1N5244 (circa 1979).

1N5890B semiconductor manufactured by Sylvania, listed as 1N5890B (circa 1979).

1N5734 semiconductor manufactured by Sylvania, listed as 1N5734 (circa 1979).

1N5570A semiconductor manufactured by Sylvania, listed as 1N5570A (circa 1979).

1N5520 semiconductor manufactured by Sylvania, listed as 1N5520 (circa 1979).

1N5369B semiconductor manufactured by Sylvania, listed as 1N5369B (circa 1979).

1N5243B semiconductor manufactured by Sylvania, listed as 1N5243B (circa 1979).

1N5733B semiconductor manufactured by Sylvania, listed as 1N5733B (circa 1979).

1N5570 semiconductor manufactured by Sylvania, listed as 1N5570 (circa 1979).

1N5519B semiconductor manufactured by Sylvania, listed as 1N5519B (circa 1979).

1N5369A semiconductor manufactured by Sylvania, listed as 1N5369A (circa 1979).

1N5307B semiconductor manufactured by Sylvania, listed as 1N5307B (circa 1979).

1N5243A semiconductor manufactured by Sylvania, listed as 1N5243A (circa 1979).

1N5890 semiconductor manufactured by Sylvania, listed as 1N5890 (circa 1979).

1N5733 semiconductor manufactured by Sylvania, listed as 1N5733 (circa 1979).

1N5569B semiconductor manufactured by Sylvania, listed as 1N5569B (circa 1979).

1N5519A semiconductor manufactured by Sylvania, listed as 1N5519A (circa 1979).

1N5369 semiconductor manufactured by Sylvania, listed as 1N5369 (circa 1979).

1N5281B semiconductor manufactured by Sylvania, listed as 1N5281B (circa 1979).

1N5243 semiconductor manufactured by Sylvania, listed as 1N5243 (circa 1979).