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Issued by:
Czechoslovakia
Function:
postage due
Date:
1923
Issue:
1923 postage due
Denom:
20h
Overprint:
Ovpt color:
black
On:
postage 1918 3h issue=1918a
Color:
red violet
Design:
Hradcany
(1918)
Watermark:
unwmk
Perf:
imperf
Catalog value:
Prev:
10h
Next:
30h