1N5532B semiconductor manufactured by Sylvania, listed as 1N5532B (circa 1979).

1N5382 semiconductor manufactured by Sylvania, listed as 1N5382 (circa 1979).

1N5343 semiconductor manufactured by Sylvania, listed as 1N5343 (circa 1979).

1N5255B semiconductor manufactured by Sylvania, listed as 1N5255B (circa 1979).

1N5206 semiconductor manufactured by Sylvania, listed as 1N5206 (circa 1979).

1N5750B semiconductor manufactured by Sylvania, listed as 1N5750B (circa 1979).

1N5582 semiconductor manufactured by Sylvania, listed as 1N5582 (circa 1979).

1N5532A semiconductor manufactured by Sylvania, listed as 1N5532A (circa 1979).

1N5381B semiconductor manufactured by Sylvania, listed as 1N5381B (circa 1979).

1N5342B semiconductor manufactured by Sylvania, listed as 1N5342B (circa 1979).

1N5255A semiconductor manufactured by Sylvania, listed as 1N5255A (circa 1979).

1N5201 semiconductor manufactured by Sylvania, listed as 1N5201 (circa 1979).

1N5750 semiconductor manufactured by Sylvania, listed as 1N5750 (circa 1979).

1N5581B semiconductor manufactured by Sylvania, listed as 1N5581B (circa 1979).

1N5532 semiconductor manufactured by Sylvania, listed as 1N5532 (circa 1979).

1N5381A semiconductor manufactured by Sylvania, listed as 1N5381A (circa 1979).

1N5342A semiconductor manufactured by Sylvania, listed as 1N5342A (circa 1979).

1N5255 semiconductor manufactured by Sylvania, listed as 1N5255 (circa 1979).

1N5200 semiconductor manufactured by Sylvania, listed as 1N5200 (circa 1979).

1N5749B semiconductor manufactured by Sylvania, listed as 1N5749B (circa 1979).