I know exactly what these are! These were carnival prizes back in the 1960's. There used to be a horse race carnival game where you raced a mechanized horse against other competitors around a track. The winner would get a little horse, and you could play again and if you won, trade it in for a larger horse, trade that in for a metal one, and work your way up to that one with the clock. I haven't seen these in years, but I remember them well! As a horse nut, I always wanted to win horses!