Registered cover franked with Canal Zone 1925 15c grey 'CANAL ZONE' overprint on USA and 1929 25c on 2c carmine AIR surcharge issue (SG 92 & 119) tied by dumb 'Cork' cancels and Panama 1928 2 x 5c indigo on pale green and 2c green (SG 223/224) tied by arrival marks. Flown on the Canal Zone - Maturin, Venezuela PAA flight with diamond 'CANAL ZONE MATURIN VENEZUELA FIRST FLIGHT FEB 12 1931' cachet on front. Addressed to MATURIN with large 'Arms' arrival mark on front. Unclaimed and returned to the Canal Zone with TRINIDAD transit and CANAL ZONE arrival cds's, the latter dated APR 13 1931.