Well, here are some pictures, I've obviously got to work at my skills with a digital camera. For reference, I placed a 1903 action with a serial number of 1349588 next to it. The possible NRA sporter is the one with the Lyman 48. You can see the subtle differences in barrel contour. Given the fact that I can barely take a picture of the electro-penciled numbers on the bolt. I did not attempt to take a picture of the muzzle, there is something at 6 o'clock, but it could be a ding. On the bottom of the barrel, approximately 4 inches from the receiver there is an "I" and below that "326". [/img] [img][/img]