For example, issue 75 might look far more "modern" in terms od design than an issue numbered 100+.
Reason being that after issue 100 got printed, Vandersteen decided to change the numbering, and to re-start from the more recent issues, and re-add older issues later on with sometimes substantial re-designs. In one case, it went so far that entire scenes were deleted and replaced by a new story following re-design.
I am offering you the original design of the first editions with the original issue numbering.
Issue 3: will look familiar to you
Issue 7: only the beginning will ring a few bells, the rest did not survive the later redesign
Issues 21 (first two pictures) & 25: I think those were never redesigned and never reprinted
Issue 26: known to some of you in the redesigned version
And last but not least: issue 30. I think this one was also not re-designed and re-printed, I can't remember this weird capture scene
