50 Pfennig, 1921, Köln, signed by the mayor of Cologne <a href="//commons.wikimedia.org/wiki/Konrad_Adenauer" title="Konrad Adenauer">Konrad Adenauer</a>, front, size:47mm x 87mm
City of Cologne
2007-08
scanned by myself, <a href="//commons.wikimedia.org/wiki/User:NobbiP" title="User:NobbiP">NobbiP</a>