Here is a large silver brooch by the Danish silversmith Søren Georg Kjeldsen, whose studio was active from 1943 to 63. The timeless design looks quite contemporary, but is based on a prehistoric motif used in many Nordic cultures.
Have you seen the matching bracelet, item 1004?
Condition: Excellent, no visible damage, rollover safety clasp
Marks: 830S G.Kj
Size: 1.6" (4cm) in diameter