This is from "Bicycles From Taiwan", a report published in August 1983 on the findings of The United States International Trade Commission on a suit filed under the Tariff Act of 1930. The suit was brought by the Bicycle Manufacturers Association of America (AMF, Huffy, Murray and Columbia) alleging that bicycles from Taiwan were being sold at less than fair market value. But Schwinn and Ross opposed the suit and the commission found that there was no material harm to the domestic industry. But the interesting part is that the report includes a long background section on the industry at the time. Going by this excerpt, the Greenville plant was for lugged frame bikes, at least when it was first opened. It also backs up what
@GTs58 said, the electroforged production went to Murray in Tennessee after Chicago closed. If you want to look at this report for yourself, it's on Googlebooks and I found it by searching on "Schwinn operations 1982".
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