Vintage Mexican Sterling Silver Turquoise Aztec Amulet HUGE Pendant

This is pretty incredible! It is very large…huge even. Haha It is 2 sided: a different depiction on each. The mark is vintage: pre 80’s Taxco Castaneda Mexico 925 Eagle 3 This pendant weighs an impressive 40.9 grams! 3.5” long 2 &3/16” wide In excellent vintage condition with vintage patina here and there but not too dark.