Postcard by Brüder Kohn in Vienna with a portrait of former Grand-Duchess Marie Adélaïde of Luxembourg (1894 - 1924).  She reigned from Feb. 25, 1912 to her abdication in 1919 after WWI.  This postcard was posted in Munich on Oct. 1, 1912 (so early on in her reign) and addressed to Blankenburg, Harz with a short greeting in German.  Franked with a green 5 Pf Bavaria stamp.