The Keystone marque originated with the Munch-Allen Motor Car Co., founded in 1909 in Du Bois, Pennsylvania, by partners C. P. Munch and R. M. Allen. Although the company's factory was located in Du Bois,…
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![Massillon [1]](/img/brands/m/united-states-massillon-1.jpg?w=720&h=405)
![Matrix [2]](/img/models/c/matrix-2-cl-3.jpg?w=720&h=405)
