Located in Pittsburgh, Pennsylvania, the large animated display advertised the Westinghouse Electric Company, and was best known for the seemingly endless number of combinations in which its individual elements could be illuminated.

On December 9, 1948, the Westinghouse Electric Supply Company (Wesco) moved into a new building located at 209 West General Robinson Street in the North Shore section of Pittsburgh.

[7] The Pittsburgh Outdoor Advertising Corporation installed the Westinghouse sign in June 1967 using 3,000 feet (910 m) of neon tubing filled with argon gas, giving the display its characteristic blue color.

[opinion] The Wesco Building stood near Three Rivers Stadium, and its sign was one of several large illuminated corporate billboards that became a fixture of Pittsburgh's evening skyline.

Smaller versions of the sign, using three repetitions of the 'circle w' insignia, were erected atop the Westinghouse Outdoor Lighting Plant in Cleveland, Ohio, and on the north side of the Long Island Expressway in Queens, New York.