Bidspirit auction | Worldwide Pioneer Flights - Germany

Worldwide Pioneer Flights - Germany - 1925 (April 12-13), Regensburg Easter Flight Festival, official postcard franked by Eagle 5pf green, cancelled by Donaustauf date stamp, semi-official air post stamp of 10pf olive is alongside, tied by official Festival marking, violet ''Mit Flugzeug. D409 befördert'' is alongside, VF and scarce, Mi #15, €520, Est. $150-$200