Four First War German Imperial Airmen Picture Postcards

The first postcard illustrates two airmen standing in front of an aeroplane, inscribed "Hauptmann Ritter von Schleich im Gespräch mit Leutnant Röth" above and "646 / Postkartenvertrieb W. Sanke BERLIN N.37. / Nachdruck wird gerichtlich verfolgt." at the lower right, 85 mm x 135 mm. The second postcard illustrates an airman standing in front of an automobile, inscribed "Helmet Hirth der altbeliebte Meisterflieger wurde zum Leutnant bei der Fliegertruppe befördert" at the upper right, numbered "6012" at the lower left and "Phot Berl. Jllustr.-Ges." at the lower right, 87 mm x 137 mm. The third postcard illustrates a seated Captain Boelcke, inscribed "Hauptmann Boelcke." below and "369 / Postkartenvertrieb W. Sanke BERLIN N.37. / Nachdruck wird gerichtlich verfolgt." at the lower left, 87 mm x 136 mm. The fourth postcard illustrates a vignetted portrait of Captain Boelcke along with the fortieth aircraft that he had shot down, inscribed "FLIEGERHAUPTMANN BOELCKE" at the base of his photo and "Boelckes letzler Sieg Das 40. Flugzeug abgeschossen!", "5601" at the lower left and "Hofphot. J. Müller Dessau" at the lower right, 89 mm x 138 mm. Two are black and white, two are sepia-toned, on card stock, each with postcard backers, unaddressed, one with a large faded stamp in blue ink, ranging from very fine to extremely fine.