1988 Calgary Olympics Pin - Large Vintage Olympic Rings and Snowflake Brooch

Large vintage Calgary 1988 pin. It's in great condition for its age, probably because its been kept in a plastic box. It's difficult to get a good picture of the markings on the back but it says @COA 1979, which means it's an official Olympic pin Pin is approximately 2.5" high x 1.75" wide.