Here you can select the number of cards to be placed in a row for each of supported screen resolutions. Your current resolution is highlighted in this way.
it is a genuine usage on a cover to Germany, tied by a Chicago, Ill. Oct 26, 1933 c.d.s. and slogan machine cancel, with an appropriate Graf Zeppelin flight cachet and a Friedrichshafen receiving backstamp - the cover with a vertical crease at the left edge.
it is a genuine usage on a flown First Day cover, tied by a Washington, D.C. Apr 19, 1930 c.d.s. and slogan machine cancel, with the appropriate Graf Zeppelin Friedrichshafen to Lakehurst, N.J. flight cachets and a Lakehurst receiving backstamp.
it is a genuine usage on cover to Berlin, Germany, tied by a New York Jun 2, 1930 duplex cancel, with the appropriate Graf Zeppelin Lakehurst, N.J. to Friedrichshafen flight cachets and receiving backstamps.