One of the Goznak issues (see Fischer 342-343) was overprinted for the first anniversary of the National Council (KRN) and the conversion of the Polish Committee of National liberation (PKWN) to the provisional government of the Polish republic (RTRP).
(see Fischer 342)
Goznak is a monopolist in producing Russian postage stamps.
Piast was the legendary founder of the Polish royal line. Piast was the chief of the Polonians, Slavic tribes who settled on the Warta river banks near present-day Poznań. He united the surrounding tribes into a single political unit. The term Piast was later used for all Polish (as opposed to foreign) candidates for the Polish throne. During the years 966-1370, the Polonians were ruled by the Piast dynasty.
KRN (Krajowa Rada Narodowa) = National Council of the Country.
PKWN (Polski Komitet Wyzwolenia Narodowa) = Polish Committee of National Liberation.
RTRP (Rząd Tymczasowy Rzeczpospolitej Polskiej) = Provisional Government of the Polish Republic.
Find other Polish stamps depicting the Polish eagle
Coat of arms of Poland
Bolesław III Krzywousty (Boleslaus the Wrymouth)
Old-catholic Mariavite Church - Cathedral in Płock
State National Council
Polish Committee of National Liberation
Provisional Government of Republic of Poland