I must say that when I first saw this advertisement for Mercedes
(1924?) that I couldn't really remember seeing someone looking this
crazy trying to sell something, to anyone. Then I wondered about
insane/laser eyes in general, and couldn't come up much there, either. Barney Google certainly had "goo goo gooly eyes" but they weren't necessarily crazy/insane.
Superman on the other hand did have laser eyes, and sometimes he was (made to be) crazy--still not quite up to the Mercedes guy, and he wasn't trying to sell anything but himself and the comic that he was in. I think that the Mercedes Man might be in his own category, and I'm not so sure how successful this ad campaign could've been, especially in the Weimar/Schacht era in hyper-inflated Germany.