1888 Allen & Ginter World’s Champion Boxing Cards – N28 McMahon, 2 N29s. Lot 248. 1888 Allen & Ginter World’s Champion Boxing Cards – N28 McMahon, 2 N29s. John McMahon is the card from the first series, designated N28, f. Representatives of the N29 second series are Geo La Blanche p-f and Jack McGee f-g. Winning Bid $92. Back to List Winning Bid $92 Back to List