Baseball umpire in the 1890s who later became the president of the National League. Uncommon vintage fountain pen signature, “Glad to oblige, John A. Heydler,” on an off-white 5 x 1.75 irregularly clipped slip, with collector’s notations along bottom, and affixed to a clipped piece of cardboard. Scattered light toning from adhesive on reverse and a few light vertical folds, otherwise fine condition. Pre-certified Steve Grad/PSA/DNA and RR Auction COA.
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