For some reason, I don't think we get to Austria enough. The Republic of Austria in 1928 with a two-groschen (KM 2837).
I love the micro-state - Liechtenstein - @bart. I cannot coherently explain why, but I get such a kick out of the micro states. From Italy I will take us to San Marino - another micro-state! A three-centesimi from 1938 (KM 12).