AP111 - US Civil War Model 1863 Single action revolver.
.44 Starr Model 1863 Single action percussion revolver. No.: 33106 (frame) and 43024 (cylinder). Cleaned overall; I cannot see any clear sign of Government military inspector marks, so it is assumed to be the civilian version. Only made between 1863 and 1865, this is a major Civil War revolver;  approximately 32k manufactured, the majority, 25k bought under military contract. Frame marked with “Starr Arms Co. New York” and Starrs Patent Jan.15 1856” “M”, “W” and “M” and “B” marks to the frame and cylinder.