Gold signet ring with initials AB near Winchester Cathedral

I lost my gold signet ring with the initials AB yesterday around 6:15 pm. It's a slim 18k gold ring, about 6 mm wide, with a polished finish and a tiny nick along the outer edge. Inside the band is engraved 'AB'. It was a gift from my grandfather, so it means a lot to me and I really need to get it back. I think I last had it while walking from the Guildhall toward High Street near Winchester Cathedral's North Gate; I might have dropped it outside the Cathedral gift shop on High Street. If you found it, please drop me a note at [email protected]; I’d be forever grateful.