I believe the late 1930's 1903 NRA Sporter barrels were star gauged but lacked the star on the muzzle. These would have a star gauge number on the bottom of the barrel in the area that would be concealed by the forend. I have a couple of NRA Sporters that have aftermarket checkering on the stocks and a couple of 1922M1's that also have aftermarket checkering. Will be happy to photograph and email you pics if you haven't already gotten what you need.