We have a couple Italian members,,,maybe they will eventually drop by and could add something..

Being a high number, and the 800 not in a oval ,maybe some kind of interim stamp [?] I've seen a few high numbers [higher than 200] but the actual rings were not DAK proper,,meaning no Swastika and Palm Tree, or no wartime date,etc..

Most of the Silver Jewelry forums are gone. 925 has their hallmark site,,,but they also have a forum. Its free to join. You might try putting on your photo and info.. But they're a bit slow there usually so give them some time to answer. You got nothing to lose at this point...