"BREMEN CATAPULT FLIGHT", 1933 Registered cover with mixed franking German Empire with Soviet Union, from Leningrad via Berlin onto the "BREMEN" and by catapult flight to New York, with special green cachet "Deutscher Schleuderflug D. 'Bremen'-New York 9./10. Juli 1933", reverse departure, transit and arrival cds. "NEW YORK 7 -9 1933"; fine and scarce