Awesome find! Thank you sir!

but now I see, that most people that like the flat design "trend", probably have no notion of design history and never even heard about the international typographic style. And that worries me, a lot.

Some of us have though, and I'll talk for days about International Style to anyone who asks :)

How do I go about asking?

too bad web design wasn't around already in those days :) it would be akzidenz grotesk in every screen.