Re: Henry Beckwith Pinfire 12 ga.
Proof Marks: Where the barrel hinges there are 2 "V" with Crown overtop, which I understand is a London View Proof with the serial number 3403.
One the bottom of barrel is numerous proofs, Duplicates parallel Starting with a Crown with interlocking CP underneath; "13"; Crown with V underneath; Lion over a half moon over a "g" which in BB says London Provisional Proof.
On top of barrel is "Henry Beckwith 58 Streeter Street Snow Hill London"
Also it has Demascus steel barrels.