This is a Double-Sided Book of 20 Lady Liberty and U.S. Flag (Forever) stamps. On September 14, 2011 the Postal Service issued a First-Class Mail Lady Liberty/Flag (Forever) se-tenant pair (two designs) in a Double-Sided Book of 20 stamps, designed by Terrence McCaffrey, USPS. The U.S. Postal Service introduced two new First-Class Mail Forever stamps featuring photographs of world-recognized symbols of the United States: the Statue of Liberty and the American flag. The photograph of Lady Liberty is by Raimund Linke and the U.S. Flag photograph is by Ron Watts.The stamps will be issued in a Double-Sided Book format and known as Lady Liberty and U.S. Flag. Forever stamps are always equal in value to the current First-Class Mail 1-ounce rate. The stamp was originally issued in December 2010. Made in the USA. Features the error image of the Statue of Liberty, featured in the news. The image was mistakenly taken from the New York, New York Las Vegas hotel.