This listing is for a very nice antique brass Stewart's Iron Works brass plaque. This plaque measures 7 1/4" x 4". It reads Stewart's Patent Jail and Locking & Operating Devices, Manufactured by The Stewart Iron Works, Cincinnati Ohio. There are 4 holes for attaching. This was purchased at the estate of a man who worked and retired from Leavenworth Penitentiary in Kansas. Great piece. Hard to find.