Hallmarked with: 830 S + maker's mark (see picture). Size of the heads approx. _gsrx_vers_1536 GS 9.4 (1536). JACOB KROGMAR - DENMARKVery nice 1940s designer cufflinks (cufflinks) made of 830 silver- Material: 830 silver- hallmarked with: 830 S + maker's mark (see picture)- Size of the heads approx. 15.70x15.70mm- weight approx.