General Bronze Corporation

The General Bronze Corporation (also known as General Bronze or GBC) was an American metals fabricator, primarily of bronze and aluminum, and the most recognized company in the architectural bronze and aluminum industry during the first half of the 20th century. It was known for New York City's Seagram Building on Park Avenue designed by Mies van der Rohe, the Atlas and Prometheus bronze sculptures in Rockefeller Center, the bronze doors for the United States Supreme Court, Commerce, and Department of Justice Buildings in Washington, DC, the aluminum windows for the United Nations Secretariat Building and Chase Manhattan Bank Building, and for the design of the Arecibo Radio Telescope suspension system.

Source: Wikipedia — General Bronze Corporation (CC BY-SA 4.0)