10 Gr and 1 Zl on international registered letter Cracow 5.3.41 to the Polish Interned Hochschullager in Winterthur / Switzerland, reverse OKW-censorship as flow path censorship, Swiss box cancel of 2 lines \"delivered / field post office\" and red \"routing label. Army postal service. \", reverse arrival \"army postal service / Poste de Champagne 13.3.41\"