Front of an airmail cover bearing a boxed ship imprint: "S. S. EXPORT BUYER / American Export-Isbrandtsen Lines / Off. No. 288076." Circular Balboa, C.Z. postmark dated NOV 28 1971 and cancellation bars tie an 11c Canal Zone airmail stamp; a US 6c flag/White House stamp is also present. Address is typewritten to Mr. Edward J. Lund, Houston, TX 77018, US America. No handwritten message on the front; cover marked in large type "-AIRMAIL-."
Notes for Cover Collectors: • High-resolution scans of front and back are provided; use zoom to inspect postmarks, cachet details, and backstamps. • No third-party grading; condition is shown in the images.