Germany, Semi-Official Airmail, 1913, 25pf Feldberg - Mülhausen flight issue, canceled by special Sep 13, 1913 cds on postcard additionally franked with 5pf green tied by Mulhausen cds, real-photo postcard of flight pilot Arthur Faller standing in front of his aeroplane, card sent by Faller and signed by him on both front and reverse, Very Fine. Michel No. 10; €900 on cover ($1,000)  Estimate $250 - 350. $0 (Image)