well, you learn something every day - "The pattern on the official WOW kerchief material is not polka dots, but is based on the symbol of the exploding cannon ball that is part of the logo for the U. S. Ordnance Department."
Have you really tried to save gas by getting into a car club? This vintage WWII poster encourages the home front viewer to join a car club in order to conserve fuel. A soldier is pictured looking straight ahead while the text asks the viewer if they've done enough to save gas. Illustrated by Harold Von Schmidt, 1944.