that catalog looks to me like the whole 600 frame is 531CS isn't this correct?
I never realized there were so many 'grades' of 531 tubing. that gazelle page would be nicer if there was a way to see a sample of decal. but then again it seems 531 is very "mix n match" you could actually have the highest quality main tubes and the cheapest stays and still have a "all 531 frame" so you would have to be a real reynolds geek to tell what is what
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk