Patent 930 is for the Greener Facile Princeps action of 1880. Choke just means simply that the barrels are not cylinder. Sorry to be as simple as that but there will be no indication of the degree of choke other than by measuring the internal diameter and the degree of constriction at the muzzle in 1/1000ths. of an inch. Outwardly there are little signs of wear and if the barrels are clean and original dimensions inside it would be a good candidate for reproof for nitro. Most guns in good order seem to pass o.k. The stock oval is for the owner's initials, crest or monogram. Lagopus.....
