A double-truck ad for Kleenex. I remember this being of great interest to me, studying the way things used to look like. Why, it's possible my entire interest in retro package design stems from this very page.

Really: where else might I have seen such examples? Even then I think I noted the difference between the 20s and the 40s - they seem to come from entirely different cultures. The 20s design will always look old; the 40s design will always look modern. Everything we design today is a tribute to that era, an argument, or an intentional insult.