Nice Art Deco double sided antique cufflinks from the 1930s with a glass cabochon stone in a beautiful shade of deep blue glass.  The stones themselves are small in size, as was most of the jewelry of the Art Deco period.  But the glass stones sit rather high and give off the amazing sheen of a blue butterfly.  Shaped like candy Dots, the links are an intense shade of Royal Blue in color.  Set in a silver tone collet setting, they measure 7/16 inch or 11 mm in diameter and are in excellent condition.