Antique electromagnetic knife switch or relay assembly featuring four original copper-wound coils, laminated iron cores, and heavy brass terminals mounted on a cast iron base. Used in early electrical control, telegraph, or industrial power systems during the late 19th and early 20th centuries. A scarce piece of early electrical history, ideal for collectors, museums, or restoration displays. Untested and sold in as-found condition with age-related wear and oxidation.

See photos