Celluloid pocket mirror for the Grinnell Bros. advertised as Michigan's Leading Music House with 24 Stores and a Detroit Headquarters. Center of mirror features a colorized photograph of the headquarters building with antique autos in front. Text is nicely set with metallic accents. Silvering is crazed and flaking off of mirror on reverse. Edge marked American Art Works Coshocton O. size: 2-1/8" dia.