It's an very early Griffin & Howe rifle that is not marked. The horn Schnabel is S.R. Griffin's work but the overall layout with the long pistol grip and very shot forend are not typical G&H.

The caliber is 30-06 and it still has the Armory barrel. At first I was not enamored with the rifle but after it soaked up some linseed oil and had a new pad fitted, I like it!