This is an authentic 1972 U.S. Bureau of Mines instruction manual for Koehler and Wolf permissible flame safety lamps—a rare and valuable piece of mining history.

• Original edition, not a reproduction

• Includes original clear cover and all 52 pages

• Published by the U.S. Department of the Interior, Bureau of Mines

• Covers assembly, maintenance, methane detection, and safe use of flame safety lamps

• Features 24 full-page illustrations and detailed technical guidance

• Ideal for collectors, mining historians, or industrial safety enthusiasts

Condition: Excellent – clean pages, intact binding, minimal wear on cover