Designed as a lapis lazuli platinum set with a circular-cut diamond within a rectangular-shaped setting, extending four diamond-set lines continuing to the pierced gallery, mounted on a simple platinum shank, circa 1930, attributed to Dusausoy, numbered, French assay marks for platinum, illegible maker's mark. Accompanied by a copy of the original drawing for this ring signed by Dusausoy. Ring size 51 1/2. Weight: 5.9 grams