Art Deco style diamond square cluster ring in platinum

Art Deco style diamond square cluster ring in platinum. Centrally set with a 0.40ct round Old European cut diamond in a slightly raised octagonal collet setting, set to north, south, east and west with rectangular step cut diamonds in millegrain settings and further enhanced with round Old European cut diamonds in grain settings, to a geometic cluster outlined with millegrain edging and supported by an chenier detailed gallery and flanked to either side with raised square shoulders which curve to a solid shank. Estimated total diamond weight 1.40cts. Marked platinum.