15 Pf. airmail postal stationery from Königsberg to Gdansk from 21. 12. 26, black airport cancel "Königsberg", black additional cancellation "transported through airmail Robert Meyhoefer, Königsberg i. Pr. Abtlg. Air traffic office", black flight confirmation stamp Gdansk Long load" (Michel. 22 / o1c), all postmarks on face, faultless condition