My favorite Winchester M1 rifle came from the CMP Auction in 2011, I won the bid (free shipping to your door too) I bid on this rifle because it was a three digit serial number and appears to be in original finish too. I had the correct WRA RS no trap stock and some early correct parts (had help from friends) to complete this project. Canfield's book also has a photo of this receiver, and his Winchester serial number data indicates this serial number 100931 was stamped on Jan 15, 1941