In the 1950s, the Louis Marx toy company based its toy hadrosaur on one of Charles R. Knight’s first dinosaur images for the American Museum of Natural History, painted in 1897. The toy looks nothing like our modern understanding of the hadrosaur, although the image was still prevelant as late as the 1950s.

Knight created a second image in 1909 also for the American Museum of Natural History, where it was first called Trachodon, although again the pose is not considered correct today, that painting is the era’s rendering of a Anatosaurine, probably Edmontosaurus.