1N5026A semiconductor manufactured by Sylvania, listed as 1N5026A (circa 1979).

1N4908 semiconductor manufactured by Sylvania, listed as 1N4908 (circa 1979).

1N4833B semiconductor manufactured by Sylvania, listed as 1N4833B (circa 1979).

1N4729A semiconductor manufactured by Sylvania, listed as 1N4729A (circa 1979).

1N4586 semiconductor manufactured by Sylvania, listed as 1N4586 (circa 1979).

1N4428B semiconductor manufactured by Sylvania, listed as 1N4428B (circa 1979).

1N5131 semiconductor manufactured by Sylvania, listed as 1N5131 (circa 1979).

1N5026 semiconductor manufactured by Sylvania, listed as 1N5026 (circa 1979).

1N4907A semiconductor manufactured by Sylvania, listed as 1N4907A (circa 1979).

1N4833A semiconductor manufactured by Sylvania, listed as 1N4833A (circa 1979).

1N4729 semiconductor manufactured by Sylvania, listed as 1N4729 (circa 1979).

1N4585 semiconductor manufactured by Sylvania, listed as 1N4585 (circa 1979).

1N4428A semiconductor manufactured by Sylvania, listed as 1N4428A (circa 1979).

1N5129 semiconductor manufactured by Sylvania, listed as 1N5129 (circa 1979).

1N5025A semiconductor manufactured by Sylvania, listed as 1N5025A (circa 1979).

1N4907 semiconductor manufactured by Sylvania, listed as 1N4907 (circa 1979).

1N4833 semiconductor manufactured by Sylvania, listed as 1N4833 (circa 1979).

1N4728A semiconductor manufactured by Sylvania, listed as 1N4728A (circa 1979).

1N4583B semiconductor manufactured by Sylvania, listed as 1N4583B (circa 1979).

1N4428 semiconductor manufactured by Sylvania, listed as 1N4428 (circa 1979).