I've got two decks with the same design, one blue and one red. Sad to say, I don't have any boxes.

Am I to understand that this is not a Banknote deck? Is there any name for this back design?

Also, my decks, I think, is newer. According to a page I found the "K" can be as late as 1988. When did they stop making this backs?

(I'm sorry if my questions already seems to be answered, but I'm from Sweden and new to the american decks. So I don't quite get the abbreviations.)