u/Dull_Cat_7251

Trying to identify the maker’s mark on this vintage sterling silver carnelian ring.

Marked “925” with an unknown hallmark that looks like mirrored S shapes or a crest/shield. Heavy modernist/artisan style ring with a rectangular red carnelian cabochon.

Does anyone recognize this maker or country of origin? Scandinavian? European studio silver maybe?

Any help appreciated.