CHALLENGE OF THE SUPERFRIENDS Original Production Pencil Artwork (Hanna-Barbera, 1977-8)

Here's another of my newest treasures! It's production artwork for Gorilla Grodd from one of the defining animated series of my youth, CHALLENGE OF THE SUPERFRIENDS.  Originally I thought it must be from the opening sequence, but I went back and checked, and the pose doesn't line up 100%, so it;'s probably from another scene.  But, at least Grodd was in only one series...unlike our next upcoming entry, which is much more difficult to pin down...