Hmm36319,
Call Dewey Vicknair in PA. He may no longer be in the gun repair trade but he is wealth of information on these guns. I inherited a C grace from from great uncle and Dewey was very helpful in identifying grade and he sent me a copy of the DG article. If you can not locate a copy pm and I,ll send you a photocopy.
Mine has laminated barrels that I had refinished, choked, full and full, and I shoot it on clays.
These are very well made, solid guns and from the little research I have done H&R manufactured several thousand at most before discontinuing production by the 1890s.
Enjoy,
John