This is a rare copy of the first printing of the first release UK version. This is doubly rare as it a rolled, un-cropped copy that is an inch oversize - these are often called reference proofs.
Episode VI- Return of the Jedi ends the Star Wars trilogy on a strong note and was nominated for 4 oscars. There were two versions of the UK quad - the earlier version omitted several characters and these were added later. This is the 1st print for this poster.