This is the third stock certificate that I have seen printed by Altemus and Co. This 1882 certificate represented 500 shares of the Summit County, Colorado Mineral Hill Mining and Smelting Company.
This piece is especially nice because of the illustrations of mining life. Interesting that this Colorado company would use a Philadelphia publisher to print its stock certificates.
To see more Altemus ephemera see http://henryaltemus.com/ephemera/ephemera.htm.