Cover with typed 'PRIMER CORREO AEREO TAMPICO-MEXICO' at top franked with 1923 10c rose carmine and 1927 25c sepia & lake AIR issue (SG 442 & 454) tied by TAMPICO cds dated 15 APR 1928. Flown on the 'Mexico - Tuxpan - Tampico' first flight with boxed first flight cachet in purple on front. Addressed to MEXICO CITY with transit & arrival marks on reverse. (Muller #8)