Marvin Hart (September 16, 1876 – September 17, 1931) original signature. Hart was the World Heavyweight Boxing Champion from July 3, 1905 to February 23, 1906. He was nicknamed "The Louisville Plumber" in reference to his previous profession. In 1905, Hart gained considerable prominence when he defeated Jack Johnson. Framed in a custom presentation. A rare piece of boxing's early history.