I'm curious what people know about the decorative bolt surface treatments seen on much early American bolt action work that is not the standard engine turned jewel surface. I've seen jeweling on several G&H rifles, but it seems like most other shops were doing different things, usually either an XXX crosshatch style or a random "cobweb" style. How was this treatment done? The crosshatch pattern looks to me similar to the British practice of using abrasive paper to stripe the faces of guns and sometimes action internals, but I don't have a clue about the cobweb surface. I wonder why engine turning wasn't the default treatment and so many shops opted for these more random and almost messy approaches.
![[Linked Image from i.imgur.com]](https://i.imgur.com/OSaXFzO.jpeg)
![[Linked Image from i.imgur.com]](https://i.imgur.com/0kQv3Lu.jpeg)
Rifles are a non-Hoffman John Dubiel and a later Niedner 250/3000.