Vintage 925 Sterling Silver TA-7 Mexico Belt Buckle Ring

Vintage 925 Sterling Silver TA-7 Mexico Belt Buckle Ring (There's a #7 after the TA (See photo) & usually these are stamped with 73 but theres no other number along with the 7 on this ring) Wear consistent with age. (Sold as is) **Not sure what size ring is being that it was given to me a long long time ago & now I can only put it on my pinky finger** **Hand not included!**