Welcome to the forum. That looks like a very nice, authentic West Wall ring to me. The link below will take you to an excellent article on West Wall Rings. The author is a member of this forum. Your ring is the same pattern as shown with #29 on p.16 of the article.
http://gerdhagedorn.de/resources/MS+GH+Der+Westwallring+$28Web+2$29.pdf
Cheers,
Stephen
