Signed L.S. and marked 1/20 12k G.F.. Louis Stern gold-filled screw-backs with pale aquamarine and clear rhinestones. 5/8 inches tall. L.S. is the mark for Louis Stern company which was established in the late 1800's and continued until 1950. These earrings are from the 1940's when aquamarine and white (clear) crystal rhinestones were very popular. During WWII variations of red, white and blue were worn- with aquamarine blue being a very popular blue at that time.