First gloved heavyweight boxing champion of the world, 1892–1897. Fountain pen signature, “Sincerely, Jas. J. Corbett,” on an off-white card, dated August 6, 1931. Double matted with two photos of Corbett, one as fighter and one as gentleman, to an overall size of 18 x 16. In fine condition, with a trivial spot of light toning to top right. COA Steve Grad/PSA/DNA and R&R COA.