United's Four Engine Mainliners -- The Age of Flight Is Here . . .
Finely executed pictorial map of the the United States, illustrating United Air Lines routes across the United States, along with the ines of other airlines, proposed routes and routes of LAMSA Air Lines in Mexico.
The verso includes photos and promotional text for United's newest aircraft, the Mainliner 230, with four engines and a cruising speed of 230 miles per hour, carrying 44 passengers.
A further note advertises and "altitude conditioned" Mainliner 300, which was due to start service in Septeme and carry 54 passengers at a speed of 300 miles per hour, crossing the country in 9.5 hours!
d Air Lines certificated routes, routes applied for, connecting air lines' routes and other air lines' routes. Provides and overview of map routes, cities, parks, industry, agriculture, recreational activities, etc. On verso: cover title and promotional and informational text: Finest meals aloft, with full color illustration of a United Airlines stewardess with a scrumptious looking tray of food, and United's four engined mainliners, with views of United Air Lines two engine prop plane in flight, passengers deplaning United 4 engine mainliner.