I don't even know if Joe La Pompe is a real person, but he/she sure has a neat web site. It's new to me, but others may know more about it since its been around for some years. I, however, only discovered it yesterday and, if nothing else, a blog is for sharing enthusiasms. Anyway, look at it. La Pompe, based in France, is a kind of historian of advertising who keeps track of who did what first and has the pictures to prove it.
(Ad on left if from 1998; other 2005)