Rare Art Deco diamond and platinum watch ring, the oval case with single cut diamonds in platinum millegrain setting, the concealed winding crown formed by the shoulder, the movement unsigned, the case engraved 'platinum S & J M' on platinum shank, size R½, in original box with the original receipt of purchase from Jays, London, dated 3rd March 1932.Condition report: Good conditionmensurate with age. Not currently running.