St. Louis Zoo memorabilia signet ring, adjustable sizing (see pics)

St. Louis Zoo memorabilia signet ring, adjustable sizing (see pics) Purchased in a lot at auction, so I do not know the backstory/brand/material. Sorry! Pre-owned condition, please see all pics for details of wear and let me know if you have any Qs about the item, about bundling, etc. Smoke-free, pet-friendly home **To be eco-friendly, your item will be carefully packed/protected in clean, pre-used materials St. Louis Zoo memorabilia signet ring, adjustable sizing (see pics)