The product is a printed (lithograph) postcard featuring the Illinois Underground Tunnel in Chicago, Illinois, dating back to around 1915. This postcard is a piece of topographical history depicting a unique transportation system from the early 20th century in the United States. The divided back design adds to its collectible value, making it a valuable addition to any postcard collection focusing on cities and towns in North America. Has edge & corner dir=\"ltr\" style=\"margin-top:0; margin-bottom:0;\">8pc

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