Unisex Vintage Signed 925 Sterling Ring with Carved Swirl Designs

I believe this beautiful ring was created by Metropolitan Museum of Art. The signature (MMA 925) looks very close to other signatures from Metropolitan Museum of Art I have been able to find. The ring is thick, (see pictures) and carved with designs that looks like elongated S's, with a silver line going down the middle of the ring. Due to the age of the ring, there is some patina that I have chosen to leave as is. If you would like the ring cleaned before I send it, just let me know and I will take care of it. The size of the ring is between a size 5.5 and a 6 (US.) All items come from a non-smoking, pet-loving home. I "rescue" jewelry that has been put aside, and make something new and beautiful from it. (Or, in the cases of pieces that need no changes, I list them as they have come to me.)