1937, two mixed 6 Pfg private GS postcards, 12th German singer federal celebration Breslau, at this C30/03 illus. city hall Breslau with - correctly stamped ZuF and corr. commerative cancel as a foreign postcard to the USA (damages at the margin) and C30/06 illus. university - plain with a corr. commerative cancel (small crease at the corner)