The Holt 75 model gasoline-powered half-tracked ("caterpillar") tractor, circa 1914, used early in World War I as an artillery tractor. Later models were produced without the front "tiller wheel, circa 1914

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Size: 1616px × 1172px
Photo credit: © Niday Picture Library / Alamy / Afripics
License: Licensed
Model Released: No

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