This is a double action design with a bar hammer marked “ALLEN’S PATENT.” It has a 4″ long six shot .31 caliber barrel cluster marked in the flutes with “ALLEN & THURBER,” and “WORCESTER,” plus “PATENTED 1837 CAST STEEL.” It has a hand-engraved nipple shield that is separately affixed, and engraved frame and backstrap, and bag-shaped walnut grips. The frame is gray, the barrel cluster has a dark patina with extensive fine pitting on the barrels and nipple shield and light pitting on the triggerguard. The grips are each missing a small chip at the top front and have been nicely refinished. The mechanism works well. This was made between 1847 and 1865.
This is an antique pistol and transfers with no federal restrictions.