It is a 16 gauge by Hinton & Sons with 28" cyl & mod barrels; 6lbs......one that Joe Wood got tired of and pawned off on me.
Some of my collector friends who own only London best would hold it at arm's length, sniff, and declare it a "cheap, non-ejector boxlock"; but, if they ever shot birds with it, I'd have to cut their fingers loose. It's always the one I reach for when I go quail hunting, and it is a hoot for doves over decoys.