Here's a great Cooper Double Action Revolver. The Cooper Firearms Co. was based in Frankford Pennsylvania. They produced a number of pocket pistols, the most successful of which was the Double Action Pocket Revolver. These five shot .31 caliber revolvers resembled Colt's M1849 revolver; however unlike the better known Colt, Cooper's revolver could be fired in double or single action; and was among the first American revolvers to offer this feature.
This particular example is in good condition and was made in 1864. Cooper revolvers were popular private purchase sidearms for Union officers, and its quite possible that particular revolver was purchased and carried during the Civil War.
Mechanically, this revolver is excellent. The action works perfectly on both single and double action.
All markings, including the extensive patent information on to top barrel flat are intact and legible.
The bore and chambers are all very good with sharp rifling and only minor "frost pitting" in the grooves.
The grips are original and in excellent condition; retaining most of their original factory varnish.