Image #1
WORLDWIDE AIR POST STAMPS AND POSTAL HISTORY
Soviet Union
Lot #
174 | 
| Scott # 399, 423, 425, 436, B54, B57
| 1931 (February 2), mixed franking air mail cover prepared to be sent by Do X Flight through Lisbon and Dakar, however sent from Leningrad to Berlin by plane and forwarded to Colombia by ship, upon arrival uprated by six Colombian adhesives, finally delivered to Cali on March 17 by airplane either from Buenaventura or Barranquilla, mostly VF, Est. $150-$200 . |