1N4550A semiconductor manufactured by Sylvania, listed as 1N4550A (circa 1979).

1N4422B semiconductor manufactured by Sylvania, listed as 1N4422B (circa 1979).

1N5100 semiconductor manufactured by Sylvania, listed as 1N5100 (circa 1979).

1N5017 semiconductor manufactured by Sylvania, listed as 1N5017 (circa 1979).

1N4899 semiconductor manufactured by Sylvania, listed as 1N4899 (circa 1979).

1N4817 semiconductor manufactured by Sylvania, listed as 1N4817 (circa 1979).

1N4714 semiconductor manufactured by Sylvania, listed as 1N4714 (circa 1979).

1N4550 semiconductor manufactured by Sylvania, listed as 1N4550 (circa 1979).

1N4422A semiconductor manufactured by Sylvania, listed as 1N4422A (circa 1979).

1N5099 semiconductor manufactured by Sylvania, listed as 1N5099 (circa 1979).

1N5016A semiconductor manufactured by Sylvania, listed as 1N5016A (circa 1979).

1N4898A semiconductor manufactured by Sylvania, listed as 1N4898A (circa 1979).

1N4816 semiconductor manufactured by Sylvania, listed as 1N4816 (circa 1979).

1N4713 semiconductor manufactured by Sylvania, listed as 1N4713 (circa 1979).

1N4549A semiconductor manufactured by Sylvania, listed as 1N4549A (circa 1979).

1N4422 semiconductor manufactured by Sylvania, listed as 1N4422 (circa 1979).

1N5098 semiconductor manufactured by Sylvania, listed as 1N5098 (circa 1979).

1N5016 semiconductor manufactured by Sylvania, listed as 1N5016 (circa 1979).

1N4898 semiconductor manufactured by Sylvania, listed as 1N4898 (circa 1979).

1N4813B semiconductor manufactured by Sylvania, listed as 1N4813B (circa 1979).