From a 1953 article:
The New Ideal Diner in Aberdeen, Maryland, located on Route 40, a broad four lane highway that connects Baltimore with the New Jersey Turnpike, is a good example. Sparkling and clean, its counter and comfortable booths can accommodate 102. Its menu caters to a wide range of eating tastes.

On the average day, you will find chauffeured limousines sharing its parking space with jeeps, hot rods and station wagons. You might even bump into Maryland’s Governor Theodore McKeldin, Jr. It is one of his favorite stopping-off places when he is traveling on the road.

The New Ideal’s owners, Steve Karas, Jr., and his uncle, Pete Mikes, paid O’Mahony’s $105,000 for it. They could have spent as little as $30,000 for a smaller unit, or as much as $150,000 for a larger one.