I agree with John Beard. In addition to the M1903A1NM rifles, the DCM sold a few M1903A1 Service rifles (Campbell says 239) which were apparently mostly M1903 rifles with C stocks added by Springfield Armory. I have one of these rifles: serial no. 1213036. The rifle is in service configuration with a "1-21" dated barrel and "J 6" bolt. The rifle has a "SA/SPG" inspected "C" stock. The DCM sales record with the rifle describes it as: "Model1903A1, Service Type, Caliber 30, New". It was sold by the DCM on June 25, 1936. This rifle was originally assembled as a M1903 with "S" stock. However, as far as I am concerned this rifle is a documented M1903A1 service rifle because it left Springfield Armory in M1903A1 configuration.