In summary, the ad reads: specify American the finest most frequent transcontinental service ever, with 14 one stop flagships daily between New York and Los Angeles.

With the widest variety of daily departures, American offers the most convenient service available and the most luxurious as well. All of American's transcontinental flights feature DC6 and DC6-B flagships. With smartly appointed pressurized cabins, these fast roomy flagships represent the most advanced ideas in transportation comfort. That's why traveling anywhere by American is your assurance of a refreshed arrival as well as a relaxing trip. Be it inner-city or cross-country, next time you plan to travel, plan to go by flagship.

This is an American airlines Incorporated advertisement from the 1950s from the glory days of commercial aviation.