Mid century modern tri color sterling silver mexican choker collar design 58

Stunning heavy modernist link necklace by los Castillo taxco mexico and stamped with other marks possibly a eagle under los castillo which would make it made prior to 1979, and the number 58. This stunning piece weighs 136 grams. It is silver, copper and brass or bronze. Could use a polish or enjoy the rich patina - will be up to the next owner. Suitable for a small slender neck.