Registered cover franked with 1923 20c blue and 1932 'Fourth Death Centenary of Emilio Carranza' issue with 'HABILITADO AEREO 1932' overprints set of five (SG 443 & 523/527) tied by MEXICO CITY cds's dated 27 AGO 1932 with printed blue on white registration label alongside. Addressed to SWEDEN with blue & white 'Sawtooth' registration seal on reverse tied by various transit & arrival marks. Very attractive.