Germany, Airmail, 1930, 2m-4m So. America Flight Zeppelins complete. 2m single and 4m pair on flight cover, tied by "Friedrichshafen, 18.5.30" cds, red German flight cachet and reverse with purple "Correo Aereo, Rio De Janeiro, 25 Mai, 1930" oval date stamp, Very Fine and choice. Michel No. 438-439. Scott No. C38-C39  Estimate $300 - 400. $0 (Image)