This is an MCM possibly 70s vintage BRUTALIST pendant necklace made with steel horseshoe nails., It is stamped Sweden and has what appears to be an artisan mark but which is unknown and / or illegible. The pendant is 4 1/2 inches long and 1 1/2 inches wide. It is hanging on a 26 inch knotted 3 mm leather cord…. Very nice vintage condition.