Here is another great vintage postcard of the Mammoth Ore Docks in Duluth Minnesota. This one is identified #20.
Back says... Sixty percent of the world's supply of Iron ore is obtained from the Cuyuna, Mesaba and Vermillion range in Northern Minnesota.
Post card is unused and quite colorful
Enjoy and thanks for stopping by.. Hope that you will take a moment and see some of my other vintage postcards.