1988 Schwinn Circuit....mish mash??
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I don't think anything is original; still a great frame though.Image: https://cimg5.ibsrv.net/gimg/bikeforums.net-vbulletin/2000x1299/img_0246_6b77dc91c9d3697d365b41bd3cbbcfb745b6d0d8.jpg Image:...