Here is a wonderful Art Deco Egyptian revival pin. It is stamped 800 on the back and I believe that it is German. There is a bezel set opal in the center. On either side are wings done in the cloisonne enamel style. The blue and the orange enamel are translucent and the turquoise is opaque. The pin has a C-catch and a tube hinge. On the back is the 800 stamp and another tiny hallmark that I am not familiar with. It measures1 3/8" X 1/4". There are a three very tiny areas of missing turquoise enamel which you can hardly see without the aide of a loupe.
Art Deco Egyptian Revival 800 Silver Enamel & Opal Pin