Vintage Mexico Sterling Silver Pin Brooch Pendant Mayan Calendar

MEXICO 925 Sterling Silver (vintage silver patina) Fabulous detailed Mexican Mayan calendar. Can be worn as a brooch or pendant. Measures approx. 2.0 Inches in diameter Pin has a slight bend. Marked on back of brooch/pendant: (wear on mark detail) "Sterling", "925", "Mexico", with Maker's Mark: "EME" and Mexican Government Factory # "83"... (couldn't add a pic - too small for my phone camera) Very good Vintage condition