Possible post Civil War era Belgian copy of Lefaucheaux Pinfire pistol 12MM (AH8371)

NSN, circa 1860-1870, 12mm, 6" octagonal to round barrel. Approximately 80% original blue remains. Liege proof mark is stamped on the cylinder. Bore is good with strong rifling visible. Grips shows minor handling use. Action functions correctly. Many of these Belgian copies were carried and used during the Civil War and used after.