Ca. 1880s M.B. Co. counterfeit coin detector for United States gold and silver coins. Newman-Mallis IV-2-10. Rocker arm balance with integral fulcrum and cast-iron base. Nickel plated brass balance arm. Very Fine.Lightly oxidized but not terribly distracting. A scarce detector marketed by the M.B.Coin Scale Company of Milwaukee, Wisconsin, but utilizing the February 1882patented design by James T. McNally and Walter H. Harrison. Slots for testing nine different denominations.
