Vintage Scandinavian possibly Icelandic 830 Silver Brooch

Scandinavian possibly Icelandic 830 silver brooch. Beautifully chased figural scene and an unusual clasp. 

Weight: 16.5 g 

Hallmarks seem to be Icelandic and read þjoðm s; sadly little information to be found online regarding the maker.

Measurements: 4.6 cm dia