I bought this USGI birch M14 stock at a gun show yesterday. I apologize for the quality of the photos below but it's the best I could do with the camera I have. The butt stock has a DOD cartouche and stamped into the butt plate is W-W and 11010263. The photo below doesn't show it well but you can read "W-W" above the part number. Apparently, Winchester made some replacement birch stocks after May 1964 and stamped the DOD cartouche on the butt stock.