"Howmet takes the door frame out of the stone age" captions an image of Stonehenge in this advertisement for aluminum door frames. No other reference to Stonehenge is apparent.

This 8.5x11.5 advertisement was published in the October 1979 issue of Architectual Record by Howmet Aluminum Corp a member of the Pechiney Ugine Kuhlmann Group a major French conglomerate.

Howmet Aluminum Corp. was sold to Alumax, Inc., an aluminum producer based in San Mateo, California, in 1983.
Butler Manufacturing™ founded 1901, acquired Howmet Architectural Products from Alumax Aluminum Corporation in 1984.

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