Germany, NSDAP. A 1939 Münster-Warendorf District Meeting Day Badge

A 1939 Münster Warendorf Kreistreffen der NSDAP badge ; in bakelite; vertical pinback; maker marked “Richard Sieper & Söhne, Lüdenscheid, RZM M9/25” on reverse; measuring 36 mm in diameter; very fine condition.