Here are the 3 earliest Kenner Star Wars card backs. The A B and C. on a US Kenner 12 back . All three shown here are Made in Hong Kong, there are several Lukes and Leia’s that were made in Taiwan, and are much harder to find.
The first Star Wars figures were released on what is called now A SW12 A , all the fronts were the same for all three, but there are differences between the three versions on the back .
The 12 A has a short stubby saber shown, Being the figures originally were to have a double telescoping saber. the first card a 12 A shown below
The 12 B card has an extended Saber , and the same text box below the saber. 12B below.
The 12 C has the same saber, but the paragraph of text has been shortened. 12 C below
Here is a close up detail between the 3 .
Reproduction SW card back below – this is a fake reproduced card
12ABC