I just acquired an Eddystone U.S. Model of 1917 most of the parts are Eddystone with a few Remington and Winchester parts. I noticed what looked like a Remington R in the channel for the bolt. The front of the stock is marked E. The SSAA stamp appears on the left side of the stock. The only other marking is inside the barrel channel. It appears to be a 4. What do you think about the R stamp I have not seen one in that location before.