Thanks for the thoughts, Ann. I am pretty confident that if the middle one isn't a Peltier, it's a Vacor (In fact, I am leaning that way). We know they can look pretty close structure-wise, and the colors and glass just don't strike me as Peltier. And I agree about the MK swirls, the ones I have had and seen are tricolors too. But it seems probable that they made (and perhaps discarded) versions with fewer colors too, don't you think?