[GREAT LAKES FERRIES]. Original toilet seat from the Grand Trunk car ferry, S.S. Madison. [Manitowoc Shipbuilding Co., ca. 1927]. Original wooden hinged toilet seat and metal fitting. Mounted onto a wooden frame. Frame size 33 x 27?. Some minor wear. The S.S. Madison was a Great Lakes car ferry which operated from the late 1920s, until she was decommissioned in 1989. She has the unusual distinction to have been christened with a bottle of Wisconsin milk instead of champagne.