John Thompson wrote:
"As it is lugged steel, it could be considered KOF material. But I don't recall that 753 was ever available in oversize diameters. With the conspicuous lack of tubing decals, I'm with you in thinking it is probably True Temper."
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Not to suggest it is relevant to the bike in question, but according to the Waterford site, Schwinn began development on an OS version of 753 in 1992 and it began appearing on bikes in summer 1993. Considering the Paramount timeline, I'm guessing very few were built with 753OS.
Ed Granger
Lancaster, Pennsylvania, USA