Hmmm. Inventoried a display case today. For a Thompson SMG. "Original owner: Alabama Fuel and Iron Company, Donated to blah". That means that at some point it was probably owned by this corporation, unless they found it in an attic or gave it away at the onset of the NFA. Would it still be registered? It's not my job to figure these things out but the PD in question could certainly use a quick 30,000+ dollars.