740940 semiconductor manufactured by Sylvania, listed as 740940 (circa 1979).

740887 semiconductor manufactured by Sylvania, listed as 740887 (circa 1979).

740886 semiconductor manufactured by Sylvania, listed as 740886 (circa 1979).

740885 semiconductor manufactured by Sylvania, listed as 740885 (circa 1979).

740856 semiconductor manufactured by Sylvania, listed as 740856 (circa 1979).

740855 semiconductor manufactured by Sylvania, listed as 740855 (circa 1979).

740828 semiconductor manufactured by Sylvania, listed as 740828 (circa 1979).

740781 semiconductor manufactured by Sylvania, listed as 740781 (circa 1979).

740630 semiconductor manufactured by Sylvania, listed as 740630 (circa 1979).

740629 semiconductor manufactured by Sylvania, listed as 740629 (circa 1979).

740628 semiconductor manufactured by Sylvania, listed as 740628 (circa 1979).

740622 semiconductor manufactured by Sylvania, listed as 740622 (circa 1979).

740583 semiconductor manufactured by Sylvania, listed as 740583 (circa 1979).

740570 semiconductor manufactured by Sylvania, listed as 740570 (circa 1979).

740543 semiconductor manufactured by Sylvania, listed as 740543 (circa 1979).

740502 semiconductor manufactured by Sylvania, listed as 740502 (circa 1979).

740471 semiconductor manufactured by Sylvania, listed as 740471 (circa 1979).

740470 semiconductor manufactured by Sylvania, listed as 740470 (circa 1979).

740466 semiconductor manufactured by Sylvania, listed as 740466 (circa 1979).

740463 semiconductor manufactured by Sylvania, listed as 740463 (circa 1979).