Three German Zeppelin Postcards and Envelope

First postcard with an inset photograph of a zeppelin in flight followed by a plane on the obverse, inscribed "GRUSS aus FRIEDRICHSHAFEN" (Greetings from Friedrichshaven) at the upper left, the left side of the postcard with the tri-colour German flag, the outline of the flag and photograph embossed, reverse addressed to "Franz Hiller, Dresden" with a personalized inscription in blue ink, stamped "RESERVE-LAZARETT FRIEDRICHSHAFEN a. B." with a coat-of-arms in blue ink, postmarked Friedrichshafen on December 4, 1915, maker marked "Verlag K. Schinacher, Friedrichshafen.", printed in red, black and gold inks, on a white card stock, 90 mm x 141 mm. Second postcard illustrates a zeppelin flying over Kiel, with a pasted on angled slash in the German tri-colours at the upper left, exposing "KIEL" in the corner, inscribed "Luftschiff über der Stadt." (Airship over the City) at the upper right, reverse addressed to "Ella Hiller, Dresden" with a personalized inscription in black ink, postmarked Kiel on June 24, 1915, maker marked "Phot Verlagsanstalt Ernst Crull jr., 8341", printed in red, black and gold inks, on a white card stock, 87 mm x 138 mm. Third postcard illustrates a zeppelin flying over Kiel on the obverse, inscribed "GRUSS AUS KIEL / VIKTORIA LUISE ÜBER DEM HOHENZOLLERN-PARK" (Greetings from Kiel / Victoria Louise over Hohenzollern Park) at the upper right, reverse addressed to "Ella Hiller, Dresden" with a personalized inscription in pencil, faded postmark, maker marked "Kunstverlag Wilh Schröder & Co., Kiel" and numbered "No. 13", printed in black ink, on a white card stock, 90 mm x 143 mm. Unopened Souvenir Envelope, the obverse inscribed "Mit Luftschiff L.Z. 127. / AC: Friedrichshafen!" in handwritten red ink at the upper left, addressed in handwritten black ink to "Herrn Christ Burk / 1128, Forest Ave., Bronx / New York / U.S.A.", three postmarks indicating the envelope was stamped at Friedrichshafen on October 7, 1928, stamped in blue ink "Mit Luftschiff LZ 127 befördert" inside an oval, with seven cancelled German Postal Office stamps, plus and Air Mail label, reverse stamped in red ink "E.H. Bornemann / Hartwig-Str. 112 / Berlin - Pankow" and postmarked New York, N.Y. on October 16, 1928, envelope fabricated from an off-white paper stock, 123 mm x 155 mm. The latter two postcards and the envelope exhibiting light wear along the edges, near extremely fine.