Calibers vary from .40 to .50 with barrels from 24" to 29"; walnut stocks. Barrels marked: "W. Billinghurst, Rochester, N.Y.", or "W. Billinghurst". Found with pill lock or percussion ignition. Over-under double barrel combination gun may bring double the single barrel model. Former Billinghurst apprentice Benjamin Bigelow produced a similar pill-lock revolving rifle in Marysville, California. Fewer than five surving Bigelow examples are known; worth premium."