Vintage Silver Onyx Ring Size 7?

This lovely ring is substantial and contains a large, single, oval onyx stone. Inside the ring are stamped the letters “FAS” and the number “925.” I’m guessing at the size because I am a size 7 and it is ever so slightly big on my ring finger. Full disclosure… Could use a good polishing. There are a number of tiny dings in both the metal and the stone. Please see pics and ask any questions. This item is sold as is. Reasonable offers considered. Bundle three or more items from my closet for a 15% discount! Thanks for looking. ☮️🌹