Colt Revolving Shotgun Model 1855 in .60 Caliber [16 Gauge] with 27" smoothbore barrel. This is a five shot percussion revolving shotgun with side hammer and brass trigger guard. Overall very nice functional original condition with aged patina without any significant pitting. Stock is solid. 13 3/4" LOP to a steel buttplate. Manufactured circa 1860 to 1868 with total production of approximately 1100 units with most being in .75 Caliber [10 Gauge]. These sold for $41 in 1867. The rarest of all Colt shoulder arms.