Silver pocket watch with chain, engraved A.J.

I lost my silver Hamilton pocket watch yesterday around 3pm near Millennium Park, along Michigan Avenue by the Crown Fountain in Chicago. It's a vintage, 2-inch steel case with a thin chain, and the back is engraved with the initials 'A.J.' The glass has a small scratch, and the watch used to tuck into a black velvet pouch that might have fallen with it. This watch has sentimental value—it's a gift from my grandfather, and I really need it back. If you found it, please email me at [email protected]; I'll gratefully offer a reward.