Taco Bell was promoting the crunchy tacos on each of its three value menus in this summer 1994 commercial: Regular tacos on the 59-cent menu, Tacos Supreme on the 79-cent menu and Big Beef Tacos on the 99-cent menu. The ad was part of the company's "Cross The Border" campaign.
Disclaimer: This ad is the property of Taco Bell, a division of Yum! Brands. I just had it on an old video tape, and I couldn't find it on YouTube.