No mystery has been solved by admitting the barrel is not original to the gun. The WS1 choke designation is later than the manufacture of this early Trap Grade. Even the auctioneer mentions that one barrel is missing. No big deal there. I still think it is an original Kornbrath gun. By the way, who owns the enamelled Kornbrath Model 12 that sold at auction a few years ago? MP, I have seen the gun you picture before, probably in a Gun Digest of the fifties or sixties. Where is it from?
I thought you had that, it's from a Kornbrath brochure. I remember the enameled gun but don't know who has it.