Produced by Alcoa Aluminum
The pre production prismatic table was done by ALCOA Aluminum (ALuminum COmpany of America. They produced a few sample models (probably in 1956) in lieu of the production run that was to take place in 1957, which, for whatever reasons was never done. There are only 2 other known examples, both owned by the Carnegie Museum in Pittsburgh PA.(Alcoa is headquartered in Pittsburgh)The other 2 tables were featured in the "Aluminum by Design" exhibit & companion book put out by the Carnegie.
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