Cover with manuscript 'Correo Aereo' at top franked with 1928 10c blue and 1929 25c brown purple AIR issue with 'Correo Aereo 1929 P.A.A.' overprint in red (SG 598 & 614) tied by oval MANAGUA cancels dated MAY 18 1929 with circular CORREO AEREO DE NICARAGUA cds alongside dated the same day. Addressed to GERMANY with arrival marks on reverse.