Mr.Greener called them serpentine fences,they were normally used on mid-grade guns.I have a self-acting ejector 10 bore that held it's own next to some clanking 3 1/2" twelve ga. autos,in the snow goose wars,last week in S.D.
Your serial dates it more in the late 1880's I think.I would like to here what your bore size is proofed at,Greener made some thin brass case guns in that serial range.
R. Glenz-
I don't think the gun has a bore size at proof as I have seen on later guns. But maybe I don't know what I am looking for. Here are some photos, perhaps they have the information you are looking for. If made for a brass case, is that significant?
