1934 (28 Jul) USSR Leningrad - Berlin - Dresden, Airmail Registered cover, flight Leningrad - Berlin (Sent as simple, but sent on airmail by mistake, Muller 41, CV $450)

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

Leningrad - Berlin - Dresden

postmark:
Leningrad TSt 28.7.1934
Berlin MLb
Dresden 31.7.1934

Postage: (from 3.5.1932)
Lp-letter 55 Kop
Registered cover 20 Kop
available 35 Kop

As airmail the letter would be 40 Kop clearly underpaid
Not delivered as airmail Letter 15 / Registered 20 Kop, but coincidentally sent as airmail

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Leningrad - Berlin - Dresden

Poststempel:
Leningrad TSt 28.7.1934
Berlin MLb
Dresden 31.7.1934

Porto: (ab 3.5.1932)
Lp-Brief 55 Kop
Einschreiben 20 Kop
vorhanden 35 Kop

Als Luftpost wäre der Brief um 40 Kop deutlich unterfrankiert
Nicht als Luftpost aufgellefert Brief 15 / Einschreiben 20 Kop, aber zufällig als Luftpost befor- dert.