The first assortment of Return of the Jedi figures had 17 figures, which now urged collectors to collect all 65. 65a is technically the second card as it is a modification of 65b. The original 65 Back card depicted all 65 figures available. When George Lucas found out that the figures were going to be released prior to the release of the movie, he insisted that they cover up the pictures of the Ewok figures keeping their appearance a secret. Unlike the Yoda scenario, this one is pretty common knowledge. If you look at the cards closely, you can see that the black smudge was printed over already fully printed cardbacks.

Also, note the change in color of the proof of purchase seal from blue to green.
 

 
Later assortments would release “refresh stickers” with current promotions to be affixed onto older stock. These stickers would create additional versions of this cardback not showcased here.