Arkivism
Butte, Montana. Anaconda Copper Mining Company. Bits for the pneumatic drilling machines are classifed as to length of shaft in this automatic machine; a segregation of bits to one-thirty-secondth of an inch is maintained
Public domain

Butte, Montana. Anaconda Copper Mining Company. Bits for the pneumatic drilling machines are classifed as to length of shaft in this automatic machine; a segregation of bits to one-thirty-secondth of an inch is maintained

Lee, Russell · 1942-01-01 · photo, print, drawing

From the collection of Library of Congress. Free to download, adapt and use — no permission needed.

Credit lineButte, Montana. Anaconda Copper Mining Company. Bits for the pneumatic drilling machines are classifed as to length of shaft in this automatic machine; a segregation of bits to one-thirty-secondth of . 1942-01-01. Lee, Russell. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.

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