Registered airmail cover with manuscript 'Via Panair' at top franked with 1944 1g carmine, 20c purple brown, 30c light blue and 1945 5c on 7p light blue (SG 594, 600/601 & 622) all tied by AEROPOSTAL PARAGUAY cds's dated 4 DEC 1945 with printed registration label on reverse. Addressed to MEXICO with transit & arrival marks on reverse.