Allenstein etc 1920-14 post-WWI, interesting range of 7 covers (2) & p/cs (5) posted from small territories which had post-war plebiscites or similar to settle disputes. Noted Allenstein (1920), Danzig (1921), Marienwerder (1920), Saar (1920 x 2), Schleswig (1920), Upper Silesia (1920). Mostly to Germany. All fine. Unusual assembly.