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Source:
Colnect
Issued by:
Russia
Function:
airmail
Date:
1933
Issue:
stratosphere ascent
Denom:
20k
Color:
violet
Design:
stratostat USSR
Watermark:
Greek border & rosettes
Perf:
14
Catalog value:
Prev:
10k car
Next:
5k ultra issue=Soviet civil aviation 10th dt=airplane over landscapes (1933) d=ANT-9 over furnaces of Donbass perf=13.75
External links:
Colnect 86983-..iet_Union_USSR