1937 National Philatelic Exhibition 'DAPOSTA' 50pf airmail souvenir sheet on an airmail registered cover together with 15pf dull purple (Air Defence League) both cancelled by fine oval 'DAPOSTA 1937 DANZIG/8.6.37-1/LUFTPOST' (last day of use) d/stamp, accompanied by a reg cover franked 50pf (2) DAPOSTA Exhibition issues taken from the M/Sheet, another cover + piece etc. (3 covers). (Image)