Hard to Find SIGNED 925 Sergio Bustamante Pin Pendant Sun Face playing flute!

Sergio Bustamante Vintage Pin I was not able to find this exact pin/pendant anywhere online. Tiny chip on right side on a ray of the sun. See pictures! Approximately 1.75" across at widest spot Approximately 2.25" top to bottom Approximately 1" thick Back reads 925 Mex GA39