Very pretty screw back earrings. Stamped with an eagle or bell like design with the number 26. These tested for sterling silver. The blue glass is a nice medium blue color. These measure 1" X 5/8". They weigh 4.4 grams each. These are not for pierced ears. Condition is very good. The glass may be foiled. The design is quite traditional Mexican in nature. I would date these great earrings at c1950's.