RARE* HAYNES YELLOWSTONE POSTCARD, GREY SERIES GREEN BACK UNDIVIDED For Sale

This rare Haynes Yellowstone postcard features a bear subject from the grey series with a green back design. The printed lithograph postcard measures a standard 5.5 x 3.5 inches and is an original from the era of undivided back postcards (1901-1907). The postcard was published by Haynes in the United States, specifically in Wyoming, and is a unique piece for collectors interested in national parks and topographical postcards.