Polaris Air Transport, Convair CV-240 (N564MA)
A different aircraft has this registration number now. The plane you see in this picture, whose first flight was in 1949, then had registration number N777DC and operated by Thrifty Threads, Inc., apparently crashed into a lagoon at Unguia, NW Colombia in April 1978. No recorded ftalities. Unused internet postcard. Grade: 1