Large used a hydraulic planer, and the exteriors of his barrels looked like that. I've never seen one date marked, but with Bill Large I don't know that it means much. Douglas barrels had smooth exteriors since they were cold drawn octagon before being rifled. If it is a Large, it will have particularly deep rifling. If thats a date mark, then Sharon, H&H, True bore, & GRRW are not candidates. Wonder if its a Paris? If Don Getz were still around he might be able to tell us. I also know that Kurn made barrels and locks, but I've never seen a Kurn barrel. I guess the only important thing is that it shoots straight.
Roger B.