1929 (18 Sep) USSR Leningrad - Ludwigshafen, Airmail postcard, flight Leningrad - Riga, Riga - Berlin (Muller 20, CV $600)

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

For airmail from Leningrad, a special postmark was used from summer 1929. a special postmark was used: "Double-decker / with airmail / Leningrad - Berlin".

Leningrad - Riga /
Riga - Berlin - (Ludwigshafen)

Postmark:
Leningrad SSt 18.9.1929
Leningrad TSt 19.9.1929
Berlin 20.9.1929
Erfurt very weak MLb

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Für Luftpost ab Leningrad wurde ab Sommer 1929 ein Sonderstempel verwendet: "Doppeldecker / mit Luftpost / Leningrad - Berlin“

Leningrad - Riga /
Riga - Berlin - (Ludwigshafen)

Poststempel:
Leningrad SSt 18.9.1929
Leningrad TSt 19.9.1929
Berlin 20.9.1929
Erfurt sehr schwach MLb