Cover franked 1922 1d brown and 1/- black on emerald GV issue (SG 219 & 227) tied by GENERAL POST OFFICE TRINIDAD (Port-of-Spain) cds's dated FE 10 1931. Flown on the Port of Spain - Cristobal, Canal Zone first flight with large boxed 'FIRST FLIGHT PORT OF SPAIN - MATURIN Airmail Routes FAM 6 and 7. PAA. Completing the Lindbergh Circle, Maturin, Venezuela' first flight cachet in purple on front. Addressed to CRISTOBAL, CANAL ZONE with arrival cds on reverse. A very rare flight. (Muller #34, only 82 covers were carried)