I don't know much about 1903 rifles, but I do know more about 1903-A3s. I recently purchased a very nice looking Springfield 1903. I think it is mostly original. The serial number is 1218xxx (1921 manufactured) and the barrel appears to be original (dated 2 - 21). The rifle is in beautiful shape with what appears to be original parkerization. I am trying to find out what the original stock cartouches should be. I get confused in reading through the internet information. Some articles claim that it should be a blocked SA FAL. Some claim that all rebuilt rifles have a circled P proof mark. Some say that original 1903s do not have a proofed P. Some talk about an eagle head cartouche.
Can you guys help me out with my request for info. Thanks, Lee