Issue: First Danzig philatelic exhibition called Daposta (Free City of Danzig, 1937)

Sunday, June 6, 1937, First Danzig philatelic exhibition called Daposta

Sunday, June 6, 1937 Free City of Danzig will issue: Souvenir Sheet "Church of the Holy Virgin in Danzig" face value 50, Souvenir Sheet "Church of the Holy Virgin, Junkers W-33 airplane" face value 50,