Robert GeritzmannRobert Geritzmann was a German politician of the Social [Democratic Party of Germany|Social Democratic Party] and member of the German Bundestag.LifeFrom 1946 to 1963 he was Lord Mayor of Gelsenkirchen. He also belonged to the German Bundestag from its first election in 1949 to 1961. He was always directly elected in the constituency of Gelsenkirchen.