Brass compass with leather fob

I lost a small brass compass with a brown leather fob yesterday around 3pm. It's about 2 inches across, with a worn brass finish and a tiny crack in the glass. The back is engraved with the initials 'LH' and there’s a frayed blue thread looped through the brass ring. The category is Other Miscellaneous Items. It was a gift from my grandfather and means a lot to me, especially for my field trips, so I’d really appreciate getting it back. If you found it near the Covered Market on Market Street in Oxford or by Blackwell's on Broad Street, drop me a message.