World's Foremost Magician, Blackstone business check, 8.5 x 3, filled out and signed by company manager Lon Ramsdell, payable to Harry Blackstone for $982.30, March 12, 1949. Endorsed boldly on the reverse in ballpoint by Blackstone. In fine condition. Encapsulated in a PSA/DNA authentication holder, grading the autograph as "GEM MT 10."
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