DESIGNER MEXICAN SILVER BROOCH/PIN WITH GOLD TRIM

This is a designer Mexican silver brooch/pin with a gold chain like trim. It is marked but I am only able to make out the following "925 Mexico". ATON are 4 other letters plus that are marked on the back. There is a highly regarded silversmith in Mexico by the name of Anton but I cannot make the connection. It also has a hook that allows it to be worn as a necklace. It measures 2 3/8 inches by 1 7/8 inches. It is in excellent condition. I am unable to accurately date this piece. I have also listed similar earrings with the same mark that is not totally readable.