Barnum Brown
The statue is one of nine dinosaurs of different species that Jonas designed and constructed for the Sinclair Oil Corporation's pavilion at the 1964 New York World's Fair in consultation with paleontologists Barnum Brown and Edwin H. Colbert of the American Museum of Natural History in New York City and John Ostrom of the Peabody Museum of Natural History at Yale University. After the Fair closed, the statue was featured in Sinclair's traveling Dinoland display.