Germany, Imperial. A Mixed Lot of Patriotic Postcards

(Postkarten). A mixed lot of six patriotic postcards, including one featuring a portrait of Prince Oskar, in uniform and with an array of orders and medals visible, the lower right corner with a Potsdam studio mark, the reverse unused, measuring 89 mm (w) x 139 mm (h), in extremely fine condition; a second card depicting Prince Oskar in uniform during the First World War, the lower right corner with a Potsdam studio mark, the reverse unused and stamped “K. HAMELMANN”, measuring 86 mm (w) x 137 mm (h), in extremely fine condition; one depicting Prince Joachim in a Hussar uniform during the First World War, the lower right corner with a Berlin studio mark, the reverse unused and stamped “K. HAMELMANN”, measuring 85 mm (w) x 135 mm (h), in extremely fine condition; one depicting Crown Prince Wilhelm with the Chief of the General Staff, the obverse maker and studio marked, the reverse unused, measuring 135 mm (w) x 85 mm (h), in extremely fine condition; one depicting Prince Heinrich in a naval uniform, the reverse unused and with paid postage dating to 1902, measuring 86 mm (w) x 140 mm (h), in extremely fine condition, and; one depicting King Albert of Saxony, in uniform and with the Grand Cross of the Iron Cross clearly visible, the reverse unused, measuring 93 mm (w) x 138 mm (h), in extremely fine condition.