mod vintage smoke grey drinking glasses set, optic swirl pattern tall tumblers

Mod vintage smoked glass bar glasses, so retro. These are a smoke gray (black smoke?) color, swirl optic pattern. The ones made famous by Duz detergent - I don't know the 'real' name of this pattern.

It's a set of eight glasses 5 1/2" tall, all in excellent condition without clouding, no chips or cracks. I love the way these are faintly purple held up to the light!