vintage COLUMBIAN PENDANT NECKLACE

The pendant has a face and headdress that resemble Mayan or Aztec art. This necklace was bought new in Columbia in 1977. It. appears to be made of a metal alloy like nickel. On the back is imprinted a coin with the words Diez Centavos and G 500. 
The pendant measure 1-1/4" x 1-3/4." It is on a chain that is made of doubled links, one plain alternating with smaller rope links. The chain fastens with a hook that can be adjusted for length and the long length is 22."

Very good condition.

Thanks for looking!