Black leather briefcase with brass lock

I lost my black leather briefcase yesterday around 3pm outside Grand Central Terminal on 42nd Street near the Information Booth. It's a 16-inch Hartmann briefcase, real leather, with a brass lock that clicks and a slightly worn corner. Inside there's a green fabric pocket, a red fabric tag with my initials 'AR' sewn inside, and a folder with a client presentation. There’s a small coffee stain on the lining from yesterday, and this briefcase really has sentimental value for me—I need the documents and a family photo back. If anyone found it, please contact me.