Vintage brass compass in display case

I lost my vintage brass compass yesterday around 3pm near Canal Park along the Lakewalk by the Aerial Lift Bridge in Duluth. It sits in a small glass display case with a red velvet lining and a brass latch; the case is about the size of a small paperback. The compass itself is brass with a dark patina, about 2 inches in diameter, and it's engraved on the back with the initials 'J.P.' and has a tiny dent in the rim. It was part of my late grandfather's collection, and it's really sentimental to me—I’d be heartbroken to lose it.