Registered cover franked with 1927 50c scarlet, 50c rose and 1p 50c red brown plus 1928 6p 80c on 4p pale blue and 1929 3p 40c on 4p pale blue AIR surcharge issues (SG 296, 300, 305, 349 & 359) all tied by SCIO AEREO POSTAL PARAGUAY cds's dated 6 JUN 1929 with black & white formular registration label with manuscript 'ASUNCION' and large CERTIFICADOS EXTERIOR ASUNCION 'Clock' cancel on reverse. Addressed to ARGENTINA with BUENOS AIRES arrival cds also on reverse.