American pitcher, manager, and executive in the early years of professional baseball, best known as the co-founder of A.G. Spalding sporting goods company (1849-1915). Extremely rare vintage ink signature, "Yours truly, A. G. Spalding,” on an off-white 3.75 x 2.25 card. In fine condition. Encapsulated in a PSA/DNA authentication holder. From the collection of Stephen Adamson.
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