Unix Support Nederland 25 jaar = Arial, but what is the upper font?
I've tried a few serif fonts, like Minion, Times New Roman, Palatino and all, but they all differ a little bit. Any ideas?

Times New Roman  Sugerida por jerseygirl 

"u" is vertically flipped "n"

You're really good! It probably IS a flipped "n", but it's not Times, check out the serif on the "n". In Times it has a tiny horizontal part before the serif ends, this one is just diagonal