Hammerback, I believe that may be one of the rare and unusual uncheckered Trap Guns. Does your gun show no sign of sanded checkering? I have one that could be its twin with wood that is still of a dimension that would indicate that it never was checkered. Does your pictured gun have a Trap Gun marked breech bolt and matted barrel. Mine has the marked breech bolt but the barrel is plain. I feel that my gun is absolutely original, just an odd variation like yours. I think some of the earlier Trap Gun examples predated matted barrels. I would sure like to see a Cody letter documenting the "plain wood" variation. Nice gun, by the way.