A few 10-point air motors were made by Pratt-Read, perhaps one in
ten, the others being 6-point of similar construction. I've been
looking for one of these also, for quite a while.

Ludwig also built a 10-point motor, but made relatively few player
actions before switching to "Standard" (brand). I have also seen
pictures of a third type, as yet unidentified.

Jeffrey R. Wood