In 1983 cardbacks were first released as 20-Back Explosion Back style cards and later as regular 20-Backs with all figure images visible on the back of the cards. A total of twelve Explosion Back cards were available in 1983. Explosion Backs were also released in 1987 so click here to view the Explosion Backs archive. Both Series One and Series Two figures were available in 1983, although Series One figures now had a new swivel-arm battle grip feature.