Vintage Marx Brontosaurus Brown 7.5" Long Neck Dinosaur. I believe this is a Marx Hong Kong Brontosaurus. It measures approximately 2.5" tall and 7.5" long. It is stamped Brontosaurus on its tail. Please see pictures. Check out my other dinosaur listing in my store! Thank you for your interest in my auction! If you have questions, please message me! I monitor my account on a daily basis. Thank you again!