Austro-Hungary 3 hellers with Poczta Polska overprint

Poland · 1919 · 3 hellers

The stamp features a large numeral '3' in the center, with 'HELLER' and 'K. U. K. FELDPOST' at the bottom. It is diagonally overprinted with 'POCZTA POLSKA'.

This stamp represents a transitional period after World War I, where newly independent Poland utilized existing Austrian postal stationery by overprinting it for its own postal service. It signifies the establishment of Polish sovereignty and postal administration.