Vintage Theda Marcasite silver ring. Circa 1960’

Theda Sterling vntg marcasite 7 ring stack NWT sz4 🌟 Vintage new old stock, marked "Theda Sterling" marcasite 7 ring stack, with connector. This company made jewelry from Art Deco through Mid-century time periods. (The tiny size makes me think early) In new condition, with original tag stating "Hand Nicked Genuine Marcasites" Because of width, this is going to fit a finger around a 4, 4.5 (because of the roundness of the interior I can't get a specific sizing)