14K white gold ring with diamonds, engraved AM

I found this ring yesterday around 3pm near the Pub Station on North 27th Street in downtown Billings, Eastern Montana. It's a 14K white gold ring with a small round diamond on top, and inside the band there's a subtle engraving 'AM'. The ring is in decent condition, with a few light scratches from daily wear, and the setting feels sturdy. I know it might be sentimental, and I’d really love to help the owner get it back. If it's yours, you can reach me at [email protected].