Date: | 1935 |
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Description: | Worker using machines to mill gear centers of a TracTracTor (crawler tractor) main frame at International Harvester's Tractor Works. |
Date: | 1935 |
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Description: | Sparks fly from a machine operated by a worker inside International Harvester's Tractor Works. |
Date: | 1935 |
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Description: | Workers grinding pistons at International Harvester's Tractor Works. |
Date: | 1935 |
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Description: | Factory workers looking at safety posters on a bulletin board at the McCormick Works. |
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