Thanks for reply's everyone. and thanks for the help Jim. It has a two grove barrel and underneath it has a punch mark that was made after it was finished. Here is the rebuild mark but when you said it had 6 sub inspectors marks I had noticed one was an "R" I have never seen this mark before. Could this be the Remington rebuild mark along with the Ogden stamp.
I also thought all first block A4's had this stock according to Poyer or is that a misprint. I have 1903a4 sn 3420626 with 2 grove 8-43 barrel with same punch mark that wear's a scant grip stock with OG stamp.Attachment 24772