ALS, one page, 6 x 9, Book-Cadillac Hotel letterhead, June 12, 1941. Mack writes his friends, Mr. and Mrs. Holt. In part: “Am sorry you are leaving for your home before you can see my boys play at Shibe Park. They have played some good ball and…they will soon start winning. Will look forward to seeing you before season closes.” In fine condition, with light wrinkling and show-through from an authentication label affixed to the reverse. Accompanied by a full letter of authenticity from PSA/DNA. RRAuction COA.
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