Pan American advertisement, from "Eikones" (=icons) magazine, April 1967 issue.
The text reads:
It is easy to choose an airline as soon as you realize the difference. The difference is experience!
With us fly more people than any other international airline. Most of these travelers are unable to justify why they choose Pan American on every journey. But they do understand, that they made a very good decision and have a feeling of safety. This wonderful feeling you feel when you travel, and only the best choice can give. You will feel it the next time you travel with the Most Experienced Airline of the World. Pamper yourself. Call your Pan American travel agent or our office: Pan American, 6, Eleftherios Venizelos Avenue, Athens. Tel.: 912.695, 611.047.
The World’s Most Experienced Airline.
Many Thanks To Alexis Doukas