There was no difference whatsoever between a Mexico and Super (aside from the tubing and chainstay decal), until the Nuovo Mexico showed up in '81/'82.
Marc
"Richard M. Sachs" wrote:
<<i speculate that between the super and the mexico, the differences were mostly cosmetic: the then-new short campagnolo dropouts, different stay-end treatments, increased use of engraved frame pieces, updated graphics, more use ofplating...ultimately, with all the pierced tubes, and gilco tubes, and stenciled paint jobs, the differences between the 2 models became more distinct. i think, originally though, it was a fancier version of the 'same thing'. in a way, similar to the masi special versus the masi gran criterium thing, only on a much larger scale.>>