10 c. multicoloured imperforate vignette "Plane at rest, Pilot foreground" tied by "CCNA / Barranquilla" oval cachet to reverse of part of First Flight cover to Barranquilla, franked additionally with Colombia 1908 1c. green and 2c. red tied by bold "CORREO AEREO" datestamp in violet, cover reduced at one side, opened out for display, an very rare franking with just 5 covers recorded, certificate holcombe (1996)