Silver pocket watch with engraved initials

I lost my silver pocket watch yesterday around 3pm near the Shambles Market entrance on The Shambles, York. It’s a vintage Elgin pocket watch with a polished silver case, about 2 inches across, attached to a brown leather fob chain that’s a touch tarnished. The back is engraved with the initials 'J.R.' and there’s a small scratch across the glass; the dial is white with Roman numerals and blue steel hands. This watch belonged to my grandfather and means a lot to me, so I’d be really grateful to get it back if someone happened to find it.