I had an employee give me this old keg he had for a while. I was supposed to see that it was some kind of cask, as I have been wanting to get into cask beers for a while. I think it has 3 openings, on of which is a wooden bung. Firestone is stamped above the wood bung, and on one end it says Anheiuser Busch. Did they ever put any beer in casks? What do I have here? Would I be able to use this for cask beer?