Originally Posted by
daka
[MENTION=512318]oneclick[/MENTION] has a good thought there. Measure the bottom bracket width - if it is 68mm wide, you know it was Carlton-built. A Nottingham built Raleigh is likely to have the wider Raleigh bottom bracket.
You can actually tell just from looking on the Cobra, the bbshell (26tpi) is much thicker-walled and it looks larger, the bb cup flanges don't reach the edge.