1917 (Jul 26) Stampless envelope to Heidelberg cancelled scarcer Feldpost Mil. Miss. Jeresalem cds & with violet circular KGL. PREUSSISCHE FELD-FLIEGER – ABTZILUNG handstamp of German Air Unit Pascha 300 & endorsed on reverse Flieger 300, XX11 A.K. Mil Miss., Kon’pole that was located at Semach…… Fine item of Ottoman Pascha300 detachment of the German Aviation unit.