Früh is a pretty famous brewery in Cologne, Germany. On their website, they have archived all their billboard campaigns, organized by year.
At the very bottom of the list, there’s a separate category called Düsseldorf, which is a rival city.
Those ads poke fun at Düsseldorf, with taunting taglines like “Now also in small villages around Cologne”, “line up”, “for relief, now available in A3 (German highway outside Düsseldorf)”.
Full archive here.