Front bladder MSA breathing apparatus (gas mask) used in coal mines in the early part of the 20th century

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The Mine Safety Appliances (MSA) Company was founded in 1914 in response to the mounting danger found in mines.

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Size: 3712px × 5568px
Location: Unspecified
Photo credit: © Rick Rudnicki / Alamy / Afripics
License: Licensed
Model Released: No

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