I'm not 100% certain, but I don't think that the smaller sets had shrink-wrapped boxes. The flaps weren't glued closed, but the contents were sealed in plastic bags to stop stuff falling out or getting lost.
I was born in 1970 and got the first sets when they came out. The single klickies were on a cardbord partial box with a clear plastic sleeve. I think that was secured with a staple.
you mean the blister packages
I meant this one, bottom right, black packaging±http://www.collectobil.com/guide/1974_indians.htm