It is wood, with blue interior. shipping box has the serial number on a sticker. Has another sticker that says "pre 29". I am thinking the case and box are later additions, especially if the pre 29 sticker came from the factory, not added by the previous owner. Gun is probably 98%. Has a slight turn line, but no evidence of it being fired, which is sad, because I like to at least shoot them once in while. How rare is the 4 inch 5 screw? What other barrel lengths did they make in the blued 5 screw?