A Super Course will have both a 531 and Carlton decal, they were made in the Carlton facility in Worksop.
Most SC's have a pretty tight geometry, especially the last generation of English built models. They have fairly short wheelbases, and short chainstays. Not usually the hallmarks of a Rando or touring machine. A 60's or 70's Dawes Galaxy is generally considered the standard english touring machine, at least in production bikes.
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I have a white PX-10, a Green Dawes Galaxy and an Orange Falcon, now I'm done.