1N5592A semiconductor manufactured by Sylvania, listed as 1N5592A (circa 1979).

1N5542B semiconductor manufactured by Sylvania, listed as 1N5542B (circa 1979).

1N5400 semiconductor manufactured by Sylvania, listed as 1N5400 (circa 1979).

1N5352B semiconductor manufactured by Sylvania, listed as 1N5352B (circa 1979).

1N5265A semiconductor manufactured by Sylvania, listed as 1N5265A (circa 1979).

1N5226A semiconductor manufactured by Sylvania, listed as 1N5226A (circa 1979).

1N5844B semiconductor manufactured by Sylvania, listed as 1N5844B (circa 1979).

1N5592 semiconductor manufactured by Sylvania, listed as 1N5592 (circa 1979).

1N5542A semiconductor manufactured by Sylvania, listed as 1N5542A (circa 1979).

1N5399 semiconductor manufactured by Sylvania, listed as 1N5399 (circa 1979).

1N5352A semiconductor manufactured by Sylvania, listed as 1N5352A (circa 1979).

1N5265 semiconductor manufactured by Sylvania, listed as 1N5265 (circa 1979).

1N5226 semiconductor manufactured by Sylvania, listed as 1N5226 (circa 1979).

1N5843B semiconductor manufactured by Sylvania, listed as 1N5843B (circa 1979).

1N5591B semiconductor manufactured by Sylvania, listed as 1N5591B (circa 1979).

1N5542 semiconductor manufactured by Sylvania, listed as 1N5542 (circa 1979).

1N5398 semiconductor manufactured by Sylvania, listed as 1N5398 (circa 1979).

1N5352 semiconductor manufactured by Sylvania, listed as 1N5352 (circa 1979).

1N5264B semiconductor manufactured by Sylvania, listed as 1N5264B (circa 1979).

1N5225B semiconductor manufactured by Sylvania, listed as 1N5225B (circa 1979).