Well I have heard from one of the sellers who knows part of his guns history. Seems a duck hunting club ordered a dozen of these long barreled guns. Where the other eleven are no one knows. He thinks they all got cut down to a more mormal length over time. This one passed through three known owners and has not been used for many decades. So at least one of these long barreled monsters was meant for waterfowl. Somebody must have thought such long barrels would give them an advantage. Perhaps just a more complete burning of black powder. Perhaps just being closer to the birds with such a long barrel.