WORLD WAR I POSTER A great American World War I poster, 20" x 30", and showing a wonderful color illustration of John "Blackjack" Pershing, General of U.S. Armies, holding the hands of two children, with the caption at top "Help him win by Saving and Serving", and urging the population to "Buy War Savings Stamps". Unfortunately bears a 5" vertical tear at bottom, pinholes to corners from prior display, otherwise good. A striking image. $150-200