Mad Max Original Australian Daybill
Note that this is a “country of origin” poster for this Australian movie! Also note that this movie had a very limited first release in 1979, and the one-sheets and daybills are a sort of purple color. When it became a big hit, a very limited number of orange posters were printed, and then “matte finish” blue posters were printed, all in 1979 (the matte finish blue posters were printed when the movie proved to be a hit, continuing the play in drive-ins!).