Vintage Finnish Sterling Silver Statement Ring - Kaunis Koru 1970s

A vintage solid silver ring of a striking design consisting of a curved rectangular plate mounted on a shank made of two curved rectangular planes of silver with a round aperture for a finger - marked for Kaunis Koru of Helsinki and date mark for 1973 - total weight 19.1grms - dimensions of face 28 x 21mm - current ring size approx K.5 (US 5.375) - 1973 Finland