Golfer (1902–1971) who, in 1930, became the only Grand Slam winner in the sport’s history, taking the U.S. and British Open and U.S. and British Amateur titles. Over the course of his career, he would win a total of four U.S. Open titles, five U.S. Amateur titles, and three British Open titles. Post-stroke middle-age ballpoint signature, “Robert J. Jones, Jr.,” on an off-white 5 x 3 card. Accompanied by a letter of authenticity from James Spence. In fine condition, with light stains to upper right corner and a James Spence authentication label affixed to the reverse. Pre-certified Steve Grad/PSA/DNA and RRAuction COA.
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