Below are very remarkable photos of Curtis Mathes Showroom damaged in 1972 Wind & Windstorms - Colorado - (1970-1972) Curtis Mathes Press Photo...JAN 10 1972, JAN 12 1972 The side wall of Curtis Mathes building on 30th St., Boulder, lies in a crumpled pile after high winds. Credit: Denver Post ..

Notice the Zenith Boxes in the repair section of the building, could have been picture tubes.

I bet back then Zenith would not like this information to be shown!! In the photo below is a close-up of the showroom section, bet you could get a good deal on these models that year.