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    • Matchless

    • View of the head frame and power house of the Matchless Mine in Boulder County, Colorado. A miner sits by a pile of lumber nearby.
    • Mine buildings--Colorado--Boulder County--1920-1930.; Boulder County (Colo.)--1920-1930.; Matchless Mine (Boulder County, Colo.)--1920-1930.; Coal mining--Colorado--Boulder County--1920-1930.; Hoisting machinery--Colorado--Boulder...
    • [between 1920 and 1930?]

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