 Especially the clubs from Hanover were frequently transferred between divisions.After the first couple of seasons went with ever-changing club numbers in the two leagues, reaching a peak of twenty, by 1954 both leagues had arrived at sixteen clubs each, which they maintained for the most of the coming seasons.In 1963, with the introduction of the Bundesliga, the disbanding of the "Oberliga Nord" and the formation of the Regionalliga Nord, the leagues fell to tier three, but initially remained unchanged otherwise.