On October 30, 1966 in San Luis Potosi, Mexico welterweights Jose "Mantequilla" Napoles and Jimmy Fields fought in the main event. Napoles stopped Fields in the 10th and final round. Offered here is a very rare on site poster for this event. This cardboard on site poster has graphic depictions of the fighters. Has a mild center crease. Stain in lower center area. Minor edge and corner wear. Light ink notations. Bold color. No tack holes. Extremely scrace. 17 5/8" x 24 1/4."