1N4971 semiconductor manufactured by Sylvania, listed as 1N4971 (circa 1979).

1N4850 semiconductor manufactured by Sylvania, listed as 1N4850 (circa 1979).

1N4753A semiconductor manufactured by Sylvania, listed as 1N4753A (circa 1979).

1N4476 semiconductor manufactured by Sylvania, listed as 1N4476 (circa 1979).

1N4405 semiconductor manufactured by Sylvania, listed as 1N4405 (circa 1979).

1N5051A semiconductor manufactured by Sylvania, listed as 1N5051A (circa 1979).

1N4970 semiconductor manufactured by Sylvania, listed as 1N4970 (circa 1979).

1N4849B semiconductor manufactured by Sylvania, listed as 1N4849B (circa 1979).

1N4753 semiconductor manufactured by Sylvania, listed as 1N4753 (circa 1979).

1N4661 semiconductor manufactured by Sylvania, listed as 1N4661 (circa 1979).

1N4475 semiconductor manufactured by Sylvania, listed as 1N4475 (circa 1979).

1N4404B semiconductor manufactured by Sylvania, listed as 1N4404B (circa 1979).

1N5051 semiconductor manufactured by Sylvania, listed as 1N5051 (circa 1979).

1N4969 semiconductor manufactured by Sylvania, listed as 1N4969 (circa 1979).

1N4849A semiconductor manufactured by Sylvania, listed as 1N4849A (circa 1979).

1N4752A semiconductor manufactured by Sylvania, listed as 1N4752A (circa 1979).

1N4660 semiconductor manufactured by Sylvania, listed as 1N4660 (circa 1979).

1N4474 semiconductor manufactured by Sylvania, listed as 1N4474 (circa 1979).

1N4404A semiconductor manufactured by Sylvania, listed as 1N4404A (circa 1979).

1N5050A semiconductor manufactured by Sylvania, listed as 1N5050A (circa 1979).