Bernice Goodspeed Sterling Silver Overlay Bolo Tie Taxco, Mexico

Vintage hand made solid sterling silver bolo tie that was made with the overlay technique. It was made by the famous Bernice Goodspeed of Taxco, Mexico. Her hallmark is on the back. The symbol is Mexican Native, but I could not find the meaning. Triangular tips have four sides, decorated on two. Measure 1 1/4" long. The slide measures 1 1/8" by 1 1/2". The tie is black cotton. 32" long. Very tarnished.  Weight 36.3 grams. A rare find.