1928 (17 Jun) Germany Berlin - Leningrad, Airmail postcard, First flight Berlin - Leningrad (Muller 373, CV $350)

From ex Dr. Peter Moeller collection that received the Large Gold Medal at the Hannover 2011 Exhibition.

From the summer of 1928, two DERULUFT lines existed:
Berlin - Königsberg - Riga - Moscow (main line)
Riga - Reval - Leningrad (branch line)
18.6.1928: Opening of the branch line Riga - Leningrad

First flight postcard

Postmark:
Berlin 17.6.1928
Leningrad 18.6.1928

Postage: (from 1.4.1927)
Card abroad 15 Pfg
Lp surcharge 20 Pfg

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Ab Sommer 1928 existierten zwei DERULUFT-Linien:
Berlin - Königsberg — Riga - Moskau (Hauptlinie)
Riga - Reval - Leningrad (Nebenlinie)
18.6.1928: Eröffnung der Nebenlinie Riga - Leningrad

Erstflug-Postkarte

Poststempel:
Berlin 17.6.1928
Leningrad 18.6.1928

Porto: (ab 1.4.1927)
Karte Ausland 15 Pfg
Lp-Zuschlag 20 Pfg