Germany, Imperial. A Mixed Lot of Patriotic Postcards

(Postkarten). A mixed lot of six patriotic postcards, including one depicting a black-and-white portrait of Generalfeldmarschall Paul von Hindenburg in his capacity as Supreme Commander of German forces on the Eastern Front, the obverse bearing Berlin studio marks, the reverse unused, measuring 90 mm (w) x 142 mm (h), in extremely fine condition; one depicting a black-and-white portrait of Generalleutnant Erich Ludendorff in his capacity of Chief of Staff of German forces on the Eastern Front, the obverse bearing Berlin studio marks, the reverse unused, measuring 92 mm (w) x 140 mm (h), in extremely fine condition; one depicting a black-and-white portrait of Generaloberst Karl von Bülow, the reverse unused and unmarked, measuring 88 mm (w) x 139 mm (h), in near extremely fine condition; one depicting Prince Oskar of Prussia in uniform, the obverse bearing a Potsdam studio mark, the reverse unused, measuring 85 mm (w) x 136 mm (h), in extremely fine condition; one depicting Generalfeldmarschall Gottlieb Graf von Haessler, the obverse bearing a Berlin studio mark, the reverse unused, measuring 87 mm (w) x 137 mm (h), in extremely fine condition, and; one depicting a black-and-white studio portrait of Prince Ernst August of Braunschweig, the obverse bearing a Berlin studio mark, the reverse unused, measuring 85 mm (w) x 135 mm (h), in extremely fine condition.