Antique platinum diamond floral cluster ring

Antique platinum diamond floral cluster ring. Centred with an estimated 0.40cts round Old European cut diamond in a raised claw setting, encircled by a row of round Old European cut diamonds in grain settings, to a flower cluster design with millegrain decoration, scalloped edging and open gallery supported by cheniers, met to either side with raised inwardly tapering shoulders which smooth to a solid shank.