I recently purchased a Dynamo style table(Single goalie, banked corners). It was manufactured under the name "Challenger". It was built in Dallas Texas circa late 70's. It is exactly like a coin operated version I had in the late 70's. I just purchased a new Dynamo textured ball and it is larger than the extremely old balls that came with the table. I remember the balls having sort of a leather texture back in the day. Would love to find some "old school" balls. Any help would be greatly appreciated. Blessings