Polar star mill. Black Hawk district colorado Stamps. R. M. News. Mar. 20, 1879. p.4 c.5 Activities; stamps; owner. R. M. News. Jan. l, 1880. p.12 c.3 Accident to employee. R. M. News. Oct. 23, 1880. p.6 c.3 Number of stamps working; production. R. M. News. Sept. 10,1882. p.3 c.4 Operating; improvements; stamps. R. M. News. Jan. 8,1871 p.4 c.4
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