Sale 707 The Knapp Collection of Airmail Flights

Romania, 1933 (Aug 19-22), Fifth South America Flight, Friedrichshafen - Recife (Michel 327), registered cover franked with 80L postage tied by Bucharest Airmail ovals, Aug 14, with red flight cachet, Friedrichshafen transit c.d.s. and Recife backstamp; also bears the Brazilian mail Condor Zeppelin cachet used for the return flight on the flap, mounted on a colorful, professionally handmade album page (text in Dutch), Very Fine.
Sieger 226; €400 ($430).
Michel €450 ($480).
Estimate $200 - 300.