1928 (October 11-15), America Flight cover franked by left sheet margin horizontal pair of Airplane over Danzig 2 1/2g, tied by oval "4.10.28" date stamp, blue oval confirmation marking and NYC"16.OCT.1928" receiver, VF and scarce, Sieger #21, C.v. €650, Est. $250-$300

250.00

1933 (May 6-10), 1st SAF cover from Danzig to Brazil, mixed franking of five Danzig (one - on reverse) and one German stamps, red Berlin-Friedrichshafen connection, blue confirmation cachet and Rio de Janeiro"10.MAI.33" arrival marking, VF, Sieger #202 var, Est. $200-$250

200.00