Date: | 1929 |
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Description: | A size 5 1/2 Joplin Special clutch hoist labeled "Keystone Driller Co." is powered by a McCormick-Deering engine and sits on display at the International P... |
Date: | 07 05 1938 |
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Description: | An International P-20 power unit powers an oil pump owned by the Rajo Oil Corporation. A building is in the background. |
Date: | 1938 |
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Description: | An International P-20 power unit is used to power an oil well owned by the Overton Refining Company. |
Date: | 11 10 1937 |
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Description: | Two men work at an oil well site powered by an International Model P-30 power unit mounted on a truck. |
Date: | 1937 |
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Description: | Two men wearing white hats stand near a drilling rig on which two International PA-50 power units are compounded. The machine on the right has a sign readi... |
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