Lapis and Onyx authentic Cuff Links

Lovely pair of lapis lazuli, onyx and sterling silver authentic cuff links, beautifully handmade with inlay channel work. The tops are 5/8 inch square and a little over 1/8 inch thick. They were made in Mexico and are stamped "925" and the maker's mark of "TN 45". This mark means it was made after 1979 and the T is probably for the place, Taxco. The 45 and the N means the maker is the 45th smith with a name beginning with N.