Cover franked with 1923 2 x 4c blue national issue and 1929 30c grey blue SCADTA issue (SG 395 & 60) tied by two fine strikes of large undated SERVICIO TRANSPORTES AEREOS ZAPATOCA cancel in purple. Addressed to GERMANY with BUCARAMANGA SCADTA transit cds on front and BARRANQUILLA SCADTA transit cds and Germany arrival cds on reverse along with boxed 'Kolumbianische Luftpost 10 Tage Zeitgewinn ! Tarif und Annahme durch Indes Dostamt' publicity cachet. A rare origination and cancel.