Prall was a Washington, D.C.-based automotive venture associated with W. Edgar Prall, who in 1897 built a car to demonstrate an engine of his own design. The engine in question was a rotary type measuring…
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![Carey [2]](/img/brands/c/united-states-carey-2.jpg?w=720&h=405)
![Balzer [1]](/img/brands/b/united-states-balzer-1_001.jpg?w=720&h=405)
