Vintage Sterling Silver Filigree Mayan Aztec Sun Calendar Brooch Pin

Fine details on this Silver Brooch. This is old....likely from the 1940s and made for a family member or beloved friend. No markings. No magnetic properties, tests as Silver.
Roll closure
Weighs 8.46g and measures 2.75" x 1 3/8ths"
Comes in gift packaging.