Taxco Abalone Sterling Silver Ring

This is a wonderful Taxco Mexican Sterling Silver and abalone shell ring.  It is in excellent condition and approx. size 7.  It is marked on the inside of the band with an eagle and a 3 inside.  On the back of the ring the marks are Taxco Mexico 925 and three initials inside.  See pictures below.  The front of the ring measures 1" x 5/8".