Give Me an N!! Give Me an S!! What Does That Spell? Confusion - 70's Rangetopper vs 80's Saucepan Recipe

I found yet another find the other day and decided that I should do an exposé to clear up any possible misconceptions out there in Corningware-Land. It has to do with the saucepans; more specifically, the round saucepans with handles that are shaped like the Visions saucepans.

There are 2 types of round Corningware saucepans.

Rangetoppers, (all one word) with aluminum clad bottoms, and regular ones that do not (have an aluminum clad bottom that is) called RangeTop (minus the "pers")

You would think that it would be fairly straight forward, but it's not. The problem is that not all Rangetoppers have a "Clad" bottom. (sigh) My assumption is that the exposed aluminum was blackening after being run through the…