1N5891B semiconductor manufactured by Sylvania, listed as 1N5891B (circa 1979).

1N5735B semiconductor manufactured by Sylvania, listed as 1N5735B (circa 1979).

1N5571A semiconductor manufactured by Sylvania, listed as 1N5571A (circa 1979).

1N5521 semiconductor manufactured by Sylvania, listed as 1N5521 (circa 1979).

1N5371 semiconductor manufactured by Sylvania, listed as 1N5371 (circa 1979).

1N5318 semiconductor manufactured by Sylvania, listed as 1N5318 (circa 1979).

1N5244B semiconductor manufactured by Sylvania, listed as 1N5244B (circa 1979).

1N5891A semiconductor manufactured by Sylvania, listed as 1N5891A (circa 1979).

1N5735 semiconductor manufactured by Sylvania, listed as 1N5735 (circa 1979).

1N5571 semiconductor manufactured by Sylvania, listed as 1N5571 (circa 1979).

1N5520B semiconductor manufactured by Sylvania, listed as 1N5520B (circa 1979).

1N5370A semiconductor manufactured by Sylvania, listed as 1N5370A (circa 1979).

1N5317 semiconductor manufactured by Sylvania, listed as 1N5317 (circa 1979).

1N5244A semiconductor manufactured by Sylvania, listed as 1N5244A (circa 1979).

1N5891 semiconductor manufactured by Sylvania, listed as 1N5891 (circa 1979).

1N5734B semiconductor manufactured by Sylvania, listed as 1N5734B (circa 1979).

1N5570B semiconductor manufactured by Sylvania, listed as 1N5570B (circa 1979).

1N5520A semiconductor manufactured by Sylvania, listed as 1N5520A (circa 1979).

1N5370 semiconductor manufactured by Sylvania, listed as 1N5370 (circa 1979).

1N5316 semiconductor manufactured by Sylvania, listed as 1N5316 (circa 1979).