Bred by Richard Sellman, Mountain Vale Ranch, Rochelle, TX, foaled May 1, 1915, bay stallion with a diamond-shaped blaze on his face and two white hind socks. Sold to Oregon State College, purchased by silent film star Tom Mix in 1917. Appeared in 34 silent films 1922-32 with claims that included up to 180 films as the Wonder Horse. There were many other film horses ID'd as Wonder Horses. including a black Morgan stallion known as Rex acquired by Chick Morrison or Jack Lindell, well-known horse trainers, found Rex at the State reformatory in Golden, Colorado. There is no identifiable link between Rex and Casey Jones (Tony), except both were Wonder Horses. Tony Died c1942, Hollywood, CA, 2 years after accidental death of Mix.
24Oct19 - the above info has been confused. Tom Mix's original horse Tony was also bred by Sellman and by Headlight Morgan. Rex,dark bay with small star, was registered as Casey Jones, had been abused and was purchased from the Boy's School in Golden by Hal Roach. This was the real Rex, called black, but registered dark bay with small star. Tony, not as dark, had a distinctive large diamond star connected to a blaze narrowing to his nose and 2 hind socks.