HUGE solid sterling silver necklace made in Mexico. The pendant is a double sided medallion with the Aztec calendar on one side and icons of Teotihuacan, Mexico on the other. THe medallion is 2 7/8" in diameter. The heavy rope chain is 20" long. Clasp hallmarked and has eagle stamp at the tip. 

I have two of these They are both available in this listing, but priced separately. They are exactly alike, from the same estate, but one has more tarnish on the chain. Each weighs 47 grams.