cover LETTER COLLECTING AGENCIES: 5Kr. red and 10Kr. blue affixed to front and reverse (respectively) of undated XU5 (opened out for display and with a few imperfections), both adhesives tied by "2K LEV.BUDA GYÜJDE.IND." c.d.s. (6.11.II), reverse with "TESCHEN" arrival c.d.s. (8.11). Rare and fine but very slightly soiled. Ryan 247, 600p. Photo