Issued by Deutsche Bundespost in 1968, this 30 Pfennig commemorative stamp celebrates the centenary of the Norddeutscher Postbezirk (North German Postal District), founded in 1868. The design reproduces two of the earliest German regional stamps—one in red (1 Groschen) and one in blue (7 Kreuzer)—symbolizing the unification of postal systems before the formation of the German Empire. This issue honors a key milestone in German postal history, linking the origins of organized national mail service with modern Bundespost heritage.