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Issued by:
Mongolia
Function:
airmail
Date:
6/20
/
1977
Issue:
11th Anniversary of Intercosmos
Denom:
4t
Color:
multicolored
Design:
Watermark:
unwmk
Perf:
Catalog value:
Prev:
1t perf=12x12.25
Next:
12/20/1977 20m issue=History of Airships and Balloons d=Montgolfier's Balloon perf=12