The Butte, Montana, copper vein deposits were worked starting in 1866, adjacent to placer gold mines. The Butte deposits, later called "the richest hill on earth," became the chief copper supplier for the nation by 1886. The principal company in Butte was Anaconda, controlled by Marcus Daly, an Irish immigrant who had learned about mining in the Comstock District of Nevada. The veins were silver-rich at the surface, but as Daly predicted, they became rich in copper deeper in the earth. The Anaconda Mining Company dominated world copper production for a while. Daly's rival in Butte was W. A. Clark, who used his mining expertise to gain wealth and political power.
By 1915, Butte was home to 70,000 people, most of them there because of the huge Anaconda Mining Company.
Capital Stock, issued in the 1960’s
Printed by the American Bank Note Company
8” (h) x 12” (w)
This certificate has vertical fold lines, punch hole cancels in the signature areas and body, and some toning from age.