It shall be unlawful for any person other than a member of the American Legion, the American Legion Auxiliary, the Sons of the American Legion or La Societe des 40 Hommes et 8 Chevaux (Forty and Eight) and the Disabled American Veterans of the World War in good standing wilfully to wear a button which is the official insignia or emblem of any of such organizations. Any wilful violation of the provisions of this section shall subject the offender to a fine of not exceeding one hundred dollars or imprisonment not exceeding thirty days.