Vintage Scandinavian Modernist Sterling Silver Men Cufflinks Elis Kauppi Finland

Vintage Scandinavian Modernist Sterling Silver Men's Cufflinks c.1960s Designed by Elis Kauppi for Kupittaan Kulta, Turku, Finland Very good condition 7/8" x 1/4"- (front of cufflink) I do not know the stone.