This ad for Northern Natural Gas Company ran in Time magazine on Sept. 17, 1965. Hats off to Susie LeGarde Menz for the find.

Here’s the fine print:

There is music in Duluth. Good music. There is the majestic, the tragic and the comic music of grand opera … sung by the world’s greatest artists … supported by Duluth’s own wealth of talent. There is the symphony. The full and glorious sounds of Beethoven … the powerful and challenging sounds of Wagner … the beautiful sounds of all the world’s good music … performed by the Duluth Symphony Orchestra which continues to build its fame as it starts its thirty-third season. Duluth offers you music. It offers all that a great city should. As one of America’s busiest ports, it’s a thriving market with productive labor and outstanding transportation facilities. And it has abundant natural gas, piped in by the Northern Natural Gas Company and distributed by the City of Duluth Gas Department. For information about plant location opportunities, write to Area Development Department, Northern Natural Gas Company, Omaha, Nebraska.