American World War I propaganda poster, 20 in. x 30 in., titled ‘Are You 100% American? Prove It!’, with the subtitle ‘Buy U.S. Government Bonds - Third Liberty Loan’. This message is surrounded by a red border, with an image of a large American eagle flanked by flags and smoking artillery pieces at the top, with a blue shield at the bottom bearing the disclaimer ‘U.S. Treasury Will Pay Interest Every Six Months’. The artist’s printed signature ‘Stern’ appears at the bottom of the image, with the name of the publisher, Sackett & Wilhelms Corp. of New York, along the bottom edge, further marked at the bottom left ’10-A’. Bears tears at the folds and mounting remnants at the top corners, else very good.