This is page 141 of the Aug 1961 Warkworth Sportings Goods wholesale catalog. They were located on St. Louis, MO. It shows the S-700 Snake Head, F-100 Devels Horse, F-700 Devels Horse Dancer, B-900 Devels Horse Ma Scooter and the C-900 Devels Horse Pa Scooter.
Page 72 has an ad for "DEVELS Horse": S-100, F-100, F-200, B-900.