Poland - 20g airmail stamp of 1934 (#176906) | StampData

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Source: Colnect

Issued by:	Poland
Function:	airmail
Date:	8/28/1934
Denom:	20g

Overprint:	CHALLENGE//1934
Ovpt color:	red
On:	9/10/1925 20g issue=1925 air

Color:	olive green
Design:	biplane
Watermark:	unwmk
Perf:	12.75x12.5


Catalog value:

In collections: used (Stan Shebs)

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External links:
Colnect 199241..Air_Tournament