Look what we have here: Sinclair Oil ads from 1931 and 1932! These off-beat dinosaur illustrations ran in the Saturday Evening Post. You will see we included the ad copy, too, for completion. We confess that we don’t understand the pictures, really. Are they sculptures? Dioramas? Paintings? Pictures of sculptural dioramas developed and then painted over? If you have a clue, educate us with a comment, please!