The product is a vintage postcard depicting the Illinois Lock and Dam at Starved Rock State Park in the United States. The postcard is original, printed on paper, and measures the standard size of 5.5 x 3.5 inches. It features a divided back and falls under the era of Linen (1930-1945), specifically reflecting the theme of Cities & Towns in North America. Ideal for collectors interested in Topographical Postcards, this single unit item captures a piece of Illinois history related to the dam and surrounding area.