Cover franked with single 1931 10c blue AIR issue (SG 378) tied by HABANA machine cancel dated MAR 1 1931. Flown on the Camaguey - Charlotte Amalie (St Thomas), US Virgin Islands first flight with CAMAGUEY cds dated 2 MAR 1931 on reverse and large 'REPUBLICA DE CUBA ADMON. CORREOS CAMAGUEY SERVICIO AEREO INTERNATIONAL PRIMER VUELO' boxed first flight cachet in purple on front. Addressed to ST. THOMAS, U.S. VIRGIN ISLANDS with arrival cds on reverse. Scarce. (Muller #66)