A rare Cassius Clay, Jim Robinson and Harold Johnson signed advertisement poster for boxing at the Miami Beach Convention Hall, 7 February 1961, Harol

A rare Cassius Clay, Jim Robinson and Harold Johnson signed advertisement poster for boxing at the Miami Beach Convention Hall, 7 February 1961, Harold Johnson v Jesse Bowdry with Cassius Clay's fourth professional fight against Jim Robinson on the undercard, signatures in ink, printed on stiff card, 56 by 36cm.