1920s Old European cut diamond plaque cluster ring

1920s Old European cut diamond plaque cluster ring with platinum settings on 18kt yellow gold. Set with ten round Old European cut diamonds in platinum grain settings, to a fancy cluster design with neat settings, millegrain borders and structured gallery, flanked by raised inwardly tapering shoulders which smooth to a solid shank. Estimated total diamond weight 2.30cts. Marked 18kt gold.