@ptrdod, first welcome to CCF. Second, I'm tending to agree with the others here that you have a fake. Your piece looks cast rather than struck, but the killer issue is Bob's point that the horse is walking in the wrong direction. I hope you have some other coins to show us--maybe one of those will be real!
"It certainly strikes the beholder with astonishment, to perceive what vast difficulties can be overcome by the pigmy arms of little mortal man, aided by science and directed by superior skill." --Henry VIII