1930–31 Netherlands Football League Championship1931–32 Netherlands Football League Championship1932–33 Netherlands Football League Championship1933–34 Netherlands Football League Championship1934–35 Netherlands Football League Championship1935–36 Netherlands Football League Championship1936–37 Netherlands Football League Championship1937–38 Netherlands Football League Championship1938–39 Netherlands Football League Championship1939–40 Netherlands Football League Championship1940–41 Netherlands Football League Championship1948–49 Netherlands Football League Championship1949–50 Netherlands Football League Championship1950–51 Netherlands Football League Championship1956–57 Eerste Divisie1957–58 Eerste Divisie1958–59 Eerste Divisie1959–60 Eerste Divisie1962–63 Tweede Divisie1963–64 Tweede Divisie1964–65 Tweede DivisiePiet de Boer