The metal wheels make it older than the newer stuff with rubber wheels.
Might look around for when the star on the side of military toys or on military equipment became popular.
My gut says 1900 to 1920, any makers marks at all on it?
My father lived in PA as a boy and talked about melting lead weights to make toy soldiers with molds, maybe there
was a side industry of cast iron toys that evolved.
It sure looks like the ancestor of the cannon I have, the angles and design are close. Maybe Conestoga Co. made
something that didn't fire in their first years.
Jim