Here is the front (parts just slipped together for photo since I have taken it apart)
I dont see anything (anything remaining?) on the top. There is an O on the bottom left end under the toggle peg hole
Right side seems bare
Left side has an N and crown. There also seems to be a similar mark on the side of the barrel itself
Pre 1916 is cool. I can live with the barrel new or otherwise. I bought it with the idea of refinishing it.