Vintage Dome Ring Sterling Silver Size 7

From the looks of it, this ring is an antique. It’s marked ‘03 on the side. Something tells me it’s not referring to 2003, but possibly, 1903. It’s engraved with, what looks like a cursive “T” or “F”. Inside, it says 925 Mexico. It’s a size 7. It hasn’t been polished. Lots of scratches on it, maybe because it’s over 120 years old? It’s also very heavy. Smoke free, pet friendly home. Reasonable offers are welcome, please and thank you.