For your consideration is this large abstract Mexican sterling silver pin. This is a thick and well made piece weighing an impressive 25.6 grams. It is marked Mexico TC-4 925. This indicates it was after 1979 and from Taxco but the pin has a great patina and very good age. This very much looks like a Sigi Pineda piece but I can not attribute the TA-4 to him or anyone else in my books.
It measures 3 inches by 1 and 3/8 inches across the widest points.
It is in excellent vintage functioning condition with a very uneven patina and a scratch in the back patina as shown.