Easily my favourite of the various Return of the Jedi posters. I found some excellent info on an ebay auction I was watching a couple of years ago:

“The art is by Kazuhiko (Kazo) Sano. The art direction and design were by Christopher Werner. There was some resizing of Lando’s head on this poster, which needed to match the general size of the other actors. Because Sano was in Japan when this decision was made, they had another artist come in to do it.

This retouch artist may have been Vincent Malizia, an airbrush artist in Los Angeles. I have an old newspaper clipping with him standing in front of the Jedi B poster and a caption that reads he was an airbrush artist for this poster.”

LAMP reports that there are three variations of this poster:

This poster was issued with 3 variations. The first variation has ‘Return of the Jedi Style ‘B’ One Sheet’ printed in the lower right corner.The second variation has the same line as the first but the NSS number ‘830013’ was added below the first line and ‘Return of the Jedi’ was repeated below the NSS number.The third variation is the international poster. The international version doesn’t have the white border around the poster and measures only 26 3/4 x 39 1/4. ‘Return of the Jedi Style B International One Sheet’ is printed in silver in the bottom right corner. The PG rating and the phrase ‘May be too intense for very young children’ was dropped from the poster and the phrase ‘Trade marks owned by Lucasfilm Ltd. (LFL) and used by Film Freak Shop under authorization’ was added to the copyright information.