British West Indies. (Jamaica - Colombia). 1943. Advertising Air Mail envelope addressed to New York bearing Colombia Yvert 327, 5c brown, Yvert 334, 1/2c carmine and Air Mail Yvert 132, 30c blue tied by Bogota date stamp routed via Jamaica with 'Opened by Examiner D./ (8809 violet h/s) and hand-stamped 'Dec 2 1943' on reverse. Burrows Type L6b with type 'L7' for comparison.