Mid-Century Sterling Scandinavian Modernist Ring C. 1970’s. A Mid-Century Scandinavian sterling silver ring by Elis Kauppi's studio Kupittaan Kulta Oy, Turku Finland. Sterling silver band with square base measuring 22 - 11 x 8mm (depth est). Stamped: Kupittaan Kulta anvil hallmark, “925 S”, “FINLAND”. Ring size 7. Containing an oval cut, faceted, brown 16.03ct smokey quartz, bezel-set in base, 16 - 12 x 5mm (depth est.), Weight: 14.40 g. In good vintage condition with minor tarnish and some minor surface scratches on the stone; wear consistent with age and use. Elis Kauppi founded his renowned jewelry workshop, Kupittaan Kulta, in Turku, Finland, in 1945, and became a foremost figure in modernist jewelry.