A friend is looking for info on a gun:
12ga SXS
Damascus.
Back action, hammers, top lever.
Birmingham proofs, 1887 -1904 range.
Only marks: "D.Murray" on lock plates,
"D Murray Stonehaven" on rib.
One different feature (for me) is a cross screw to hold the rear of the lock plates, as well as the one at the front.
I suspect this is a gun made for the trade, but seems a bit above field grade.

Any info on "D Murray'?
TIA.

Dumb, but learning...Prof Em, BSc(ME), CAE (FYI)