Ted,
wasn't Gough Thomas's Gun an 28" Atkin 12 bore.I remember him writing that he ordered it as long as it was made "to your finest pre war standards" or such wording.
It seemed he liked it very much indeed,especially the ease of opening n closing..i believe it was an assisted or self opener...he seemed to hint that it was easier to close than a Purdey...no "hard" spot
cheers
franc