Hi all, I am reaching out for assistance regarding a marking on my 1937 S/42 rifle. It is on the receiver ring, just next to the S/N & proof mark. It appears to be two straight line capital W's, over the top of each other with what appears to be an F at the top. It also has some interesting writing on the stock which again, I am hoping someone may have encountered this before & can shed some light. I have uploaded a photo of the full LH side to show the complete stock. Thanks in advance to all who may be able to assist & hopefully, others can learn also.