They were kitted together and not constructed as an assembly. Not likely the factory would have done that but most likely rails were swapped; intentionally or not. It could have been the table was in a pool hall and when they recovered the tables, they did the rails from all tables at once and...
If you are on Facebook, there is a Brunswick Gold Crown and Centennial Group. Some members have many Gold Crown parts. I'd wager if you posted there someone will have one of the feet. My Gold Crown I has the same feet and mine were in pretty rough shape too.