One Victress S4, believed to still be in existence, was used by Charles F Keen for his 1963 Keen Steamliner. In 1956 Keen had used Abner Doble as a consultant in the development of the car's steam engine. Only one of these is thought to exist. In the 1940s Keen had assembled a Stanley steam engine powered car on what is believed to be a Plymouth chassis with a Chevrolet body. That car was in England under restoration in the late 2000s.