From Stamps of the World
Jedwabno [jɛdˈvabnɔ] (German: Jedwabno, 1938-45: Gedwangen) is a village, seat of Gmina (3,682 inhabitants end 2016) , in Szczytno County, Warmian-Masurian Voivodeship, in northern Poland. Before 1945 the area was part of Germany (East Prussia).
Postmarks in Poland
Postmarks in Empire of Germany
Postmark in North German Confederation
Postmark in East Prussia province
JEDWABNO post office opened in October 1857, it used code 1943 in Kreis of NEIDENBURG, district of KÖNIGSBERG (Russia!).