Offered here is an original 1905 letterhead from the New Eclipse Drill Sharpener Company, Joseph Retallack Manufacturer. Letter sent to L. G. Carlton, President of the Findlay Gold Mining Company in Cripple Creek, Colorado. Letter in regards to a Testimonial of using this underground mining rock drill steel sharpener for three months past. Great photograph in the upper left corner of the Drill Sharpener at work in the Granite Mine in Victor, Colorado. Great display piece of Cripple Creek and Denver mining history. Thanks for looking!