The first mail-away offer to appear on Return of the Jedi cards was Nien Nunb. He was the co-pilot with Lando of the Millennium Falcon during the last half of Return of the Jedi. This figure was the last one to include a flyer describing his role in the movie. The promotion required 5 proofs of purchase and expired June 15th, 1983. Here is how the offer appeared on the back of the cards.
Here is mine with the mailer box and paperwork
and finally the original T.V. commercial