Sterling Alpaca Abalone Mexican toucan pin. There are 3 marks on this darling vintage pin: Sterling 925 in a circle with what looks like the initials MR in the center. There is an Eagle stamp (cannot make out the number) as well as the stamp by itself: Mexico. According to Bille Hougarts book this pin was made between 1948 and 1980. It measures 1 1/8" x 1 1/8"