I have an 1903 SA with a Hatcher hole... serial number 378152, minty barrel dated 1-10, S31 bolt, serif cut off, no volly notch, nice crisp two bolt finger groove stock, script P, cartouched AAJ in a box....and it is an old repark. Okay what is this if Hatcher holes started in 1939? A WWII rebuild using 1910era parts? USMC?