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Now showing items 1-10 of 11

[Pump jack #3]

Unknown author

[Pump jack #2]

Unknown author

[Pumping unit at well site]

Unknown author (1938-07)

[Pumping unit with makeshift counterweight]

Unknown author (1938-07)

[Pump jack #6]

Unknown author

[Pump jack #7]

Unknown author

[Pump jack #8]

Unknown author

[Pump jack #5]

Unknown author

[Pump jack #9]

Unknown author

[Pump jack #4]

Unknown author

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