They must have been flying first class because, believe me, I was a frequent flyer in the 1970s, and I was never served anything like that. Airline food was considered a joke -- the usual joke was "the food is lousy -- and such small portions!"For a bit of contrast, I recently came across a letter from May 1975 from an elderly relative to my parents describing her recent trip on Delta from Florida to Maine, which included a change of planes in Boston. Not sure whether she was in coach or first class:
"About 11:00 I guess they served the most delicious filet mignon, scrambled eggs, hot muffin with jam, including coffee or whatever one wanted - even champagne. Then after we left Boston they came around with a turkey sandwich made in a sesame roll, pickle, more drinks, etc., but I could not eat any more."
Little did I know what would happen to airline food in the 1980s, '90s, and then in the 21st century.