How good is the collective memory?
I think that gun visited here previously. As I recall, it was an old gun, and had been used a great deal. The pin placement was discussed exhaustively. It had been restocked, during a time period when best work was not quite.
I sort of remember it because it surfaced near the time of the Roy Roger's Purdey.
Anything there ring a bell?

Out there doing it best I can.