Registered SCADTA letter sent from Copenhagen 6 December 1926 to Bucaramanga in Columbia, franked with 15 øre and 60 øre King Chr. X alongside 10 and 20 Centavos SCADTA adhesives, all tied by Copenhagen datestamp, prepaying the Columbian air mail rate. Registration fee 25 øre plus 30 øre letter rate and additional 20 øre for 2nd rate (per 0-20 gram). In Columbia additional chareged and stamped boxed 'T $ 0,50 R'. An extremely rare SCADTA letter. On the back of the letter a DANISH CHRISTMAS SEAL 1926 tied with TPO 'Hamburg-Saßnitz' and Columbian reception mark. RARE.