It shall be unlawful for any person to place or maintain or to display upon or in view of any street any unofficial sign, signal or device which purports to be or is an imitation of or resembles an official traffic sign or signal, or which attempts to direct the movement of traffic or which hides from view any official traffic sign or signal. Every such prohibited sign, signal or device is hereby declared to be a public nuisance, and the chief of police is hereby empowered to remove the same, or cause it to be removed, without notice. (Ord. 385, 3-1-1943)