Cover franked with 1933 2c bright carmine, 1934 2 x 10c on 20c yellow green 'Servicio Centroamericano' overprint issue and 1933 1c orange TAX issue (SG 779, 790 & 814) tied by large CORREO AEREO MANAGUA 'VIA PAN AMERICAN AIRWAYS' cancels in purple dated FEB 13 1935. Addressed to CRISTOBAL, CANAL ZONE with arrival cds on reverse. Nice correct use of these overprints within Central America.