Red stamp binder with vintage stamps

I lost my red 3-ring binder of vintage stamps yesterday around 4pm near the downtown Cartersville Antique Market on Main Street, across from the old post office. It's a 9x11 inch binder with a red faux-leather cover, a small coffee stain on the front, and yellowed stamp pages inside—mostly US issues with a few international sheets. A green label on the inside cover reads 'Collection A-4,' and there's a tiny pressed postmark tucked between pages 12 and 13. This collection has sentimental value; my uncle started it, and I’m really hoping to get it back. If you found it, please let me know; I’d be forever grateful.