Mayan Calendar Pendant

Vintage Mayan calendar pendant I'm unsure if this is sterling or silver plate. I couldn't find a marking, but I've had a similar one in the past that was sterling. Pretty cool piece nonetheless. I'm pricing it as silver plate, to be on the safe side. But, hoping it's sterling for the buyer 🙂 🌟🌟🌟 Bundle 3 or more listings to receive a 50% discount offer 🌟🌟🌟