Copper on railroad flatcar, Keweenaw County, Michigan
Description:
View of copper on railroad flatcar in Keweenaw County, Michigan. Printed on front: "Keweenaw, land of Michigan's copper country. Mass copper on flat car, just out of mine." Printed on back: "The Lake Superior region is the only one in the world where pure copper in amygdaloid veins is found in commercial quantities. Payn's News Agency, Hancock, Mich. Genuine Curteich-Chicago 'C.T. Art-Colortone' post card (reg. U.S. Pat. Off.)"
