Cover franked with 1930 5c brown, 10c orange yellow & 1b slate blue AIR issue (SG 395/396 & 401) tied by oval PUERTO CABELLO cancels dated MAY 6 1930 with boxed first flight cachet in purple on front. Flown on the PUERTO CABELLO - WILLEMSTAD, CURACAO first flight by PAA. Addressed to Curacao with arrival cds on reverse. (Muller #20)