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Hello Wingslover,
working from your as found images the cycle is sending mixed messages as to origin
it exhibits fittings from both europe and asia so that if all are taken to be original it must be an example which was assembled (not manufactured) in the U.S.
note the Schwinn Approved Huret front mech paired with a Shimano rear one
Schwinn Approved Huret shift lever set
Suspect wheel hubs on as found bicycle to be of French origin since the quick release skewers are a Maillard model which launched in 1973
GT58 mentioned Greenville facility. perhaps i am in error but as recalled the Greenville facility did not open until 1986 and everyone seems satisfied that bicycle is earlier...
so, as suggested earlier, this may be a Chicago assembled bicycle
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