Collection, 1843-2020, of stock certificates, related documentation, and reference materials focusing primarily on copper mining corporations in the Keweenaw Peninsula and Ontonagon County, Michigan.

Collection, 1843-2020, of stock certificates, related documentation, and reference materials. Focuses primarily on copper mining corporations in the Keweenaw Peninsula and Ontonagon County, Michigan, but also includes stocks for local Keweenaw businesses, transportation businesses, mining suppliers, and mining corporations operating elsewhere in the United States. Contents include stock certificates, bonds, historical photographs, business records, ephemera, and reference materials.