Paul-
I would be inclined to say no as it really appears to be roughly made rather than jeweler or handmade by a jeweler. There are some who do believe rougher trench art ss pieces existed in the period. I think they were much more likely postwar made in my opinion. I would test the ring for the 835 silver if it looked really good in hand- it should be smooth and comfortable not rough or scratchy inside also.
If the ring does not test close to the silver value as marked of course the answer is obvious imho.