Lot no. 2792

"A" on 5 (small "A"), 10, 15 c. and register stamp 20 c. together with Germany 5 and 50 Pfg., all cancelled "KÖLN-FLUGHAFEN 28.11.27" on registered cover to Bogota; the cover shows on front a red boxed 'OFL./CORREO AEREO' handstamp and on reverse transit and arrival marks, very fine