Vintage Old Mark Mexican Sterling Silver Carved Onyx Face Screw Earrings Screwback – 1950s mid century estate tribal jewelry marked 925 in circle and old maker initial marks, tested, and Guaranteed to be solid sterling silver. Size is 5/8″ tall. The onyx faces are deeply carved, well made and beautifully polished stone. Condition is excellent, used. Lovely vintage tribal statement earrings for your collection.