742920 semiconductor manufactured by Sylvania, listed as 742920 (circa 1979).

742732 semiconductor manufactured by Sylvania, listed as 742732 (circa 1979).

742730 semiconductor manufactured by Sylvania, listed as 742730 (circa 1979).

742729 semiconductor manufactured by Sylvania, listed as 742729 (circa 1979).

742728 semiconductor manufactured by Sylvania, listed as 742728 (circa 1979).

742727 semiconductor manufactured by Sylvania, listed as 742727 (circa 1979).

742726 semiconductor manufactured by Sylvania, listed as 742726 (circa 1979).

742725 semiconductor manufactured by Sylvania, listed as 742725 (circa 1979).

742703 semiconductor manufactured by Sylvania, listed as 742703 (circa 1979).

742623 semiconductor manufactured by Sylvania, listed as 742623 (circa 1979).

742621 semiconductor manufactured by Sylvania, listed as 742621 (circa 1979).

742619 semiconductor manufactured by Sylvania, listed as 742619 (circa 1979).

742567 semiconductor manufactured by Sylvania, listed as 742567 (circa 1979).

742564 semiconductor manufactured by Sylvania, listed as 742564 (circa 1979).

742558 semiconductor manufactured by Sylvania, listed as 742558 (circa 1979).

742550 semiconductor manufactured by Sylvania, listed as 742550 (circa 1979).

742549 semiconductor manufactured by Sylvania, listed as 742549 (circa 1979).

742548 semiconductor manufactured by Sylvania, listed as 742548 (circa 1979).

742547 semiconductor manufactured by Sylvania, listed as 742547 (circa 1979).

742546 semiconductor manufactured by Sylvania, listed as 742546 (circa 1979).