Lot 1312 1931 SCADTA Air Mail Cover to Col0mbia, this cover is franked with SCADTA #C55 and #C58 which were intended for internal use only, and are very rare on international incoming mail. Mailed from Vancouver on MAY.26.1931, arrived Barranquilla on JUN.3 and Girardot on same day (receiver on back). There is a Canal Zone stamp at left, uncancelled even though mail would have gone through via Canal Zone. A very fine and scarce cover. Estimate C$300.