Original vintage mining magazine ad for THE J. GEO. LEYNER ENGINEERING WORKS COMPANY. Main office and factory was located in Littleton, CO.  A Story In Figures. Shown is the Assayer's Report, Foreman's Report, Bookkeeper's Report.  Manufacturers of a complete line fo Hammer Drills, covering the entire field of rock drilling.  Old 1911 coal mining equipment industry advertisement.  Would display beautifully matted and framed!

Approximate size 9 x 12 inches.