Next to the kitchen was the so-called wooden vault, so large that at most a moderate house could have fit in it. Franz Grillparzer: "Autobiography"
Astonishingly, at most means that something only applies in a particular case, but not in all cases - as one might think. Rather, among all cases there is only one, when it occurs what we call at most applies. - The Swiss gave the word a different meaning. "Have you any time?" means the same for the Confederates as in Germany, if applicable . A pretty variant.
Source: Encyclopedia of Beautiful Words | Roland Kaehlbrandt and Walter Kramer