Diamond was a taxicab brand associated with Detroit, Michigan, that emerged in 1922 through a partnership among several automotive figures. The venture was promoted by Frank L. Klingensmith, president of the Gray Motor Corporation, along…
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![Gray [5]](/img/brands/g/united-states-gray-5.jpg?w=720&h=405)
![Matrix [2]](/img/models/c/matrix-2-cl-3.jpg?w=720&h=405)
