Uncle Sam Roadside Billboard. Show your Patriotism! We could not think of a more American sign than this Uncle Sam recruiting poster. May also be used as a roof top sign. A show stopper on any layout. J. M. Flagg’s 1917 poster, based on the original British Lord Kitchener poster of three years earlier, was used to recruit soldiers for both World War I and World War II. #88-2151, Uncle Small Roadside billboard Size 4.3 W x 5.1 T Suitable for O/HO scales