Vintage Sterling Silver Mayan Calendar Warrior Medallion Pendant 16 Grams

Vintage sterling silver medallion shaped pendant with one side showing a Mayan calendar and the other side a Mayan warrior.Bale is large enough to accommodate most chains or cords. I think the pendant is hollow but it's thick walled so it feels solid and chunky. Pendant measures 1 and 5/16ths of an inch wide. Bale is stamped but it's hard to read, it looks like it is stamped Mex and 925, pendant does acid test positive for sterling silver and weighs 16 grams. O