Image #1
WORLDWIDE AIR POST STAMPS AND POSTAL HISTORY
Soviet Union
Lot #
143 | 
| Scott # C50-52
| 1934, the Stratosphere Disaster, 5k, 10k and 20k, used on individual covers together with other values, first one sent in Moscow, the other one - from Kiev to Moscow, the last one - from Moscow to Leningrad, all appropriate markings, mostly VF, Est. $300-$400 . |