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| Date: | 1940 |
|---|---|
| Description: | Cover of an advertising brochure for TD-6 TracTracTors (crawler tractors). Features photographs of crawler tractors pulling a road grader and a disk harrow... |
| Date: | 1918 |
|---|---|
| Description: | Advertisement for the Whitney tractor featuring a side view illustration of the machine at top center with a caption reading: "Tested under the most trying... |
| Date: | 1921 |
|---|---|
| Description: | Back cover of a pamphlet advertising the Caterpillar tractor with a headline that reads: "Power for Every Need." It is illustrated with six photographs of ... |
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