Richard  & Ramsay Sutherland  were brothers from Birmingham, England who partnered up from 1800-1827.  These Northwest Trade guns were used by the British to win over the North American Indians during the War 0f 1812.   This gun has a 36" barrel with Birmingham proofs and is .65 cal.  The gun itself is all there and correct but the lock is frozen and the nipple is long gone. The lock is signed R & R Sutherland and has the govt. broad arrow and the Seated Fox in the circle (Northwest trade Co.).  Somebody has added some wood filler which if I were keeping this gun for my collection I would remove. After all these are two hundred year old Frontier Indian used guns and quite honestly are supposed to be missing some wood.  However, I'll leave that to the next buyer.  
Sold