The advertisement read: She only wants what's best for you. A cool drink. A good dinner. A soft pillow and a warm blanket. This is not just maternal instinct. It's the result of the longest Stewardess training in the industry. Training in service, not just a beauty course. Service, after all, is what makes
professional travellers prefer American. And makes new travellers want to keep on flying with us. So we see that every passenger gets the same professional treatment. That's the American way.I'd like some of that "professional treatment" from a well-trained Stewardess, if they don't mind - it is the American way!

No idea on what airlines were they worked with. Some said PSA, American, Ansett... by the way, here are some cabin crew pictures around 50s - 70s