Jackie Robinson Yellow Hall of Fame postcard, signed by Robinson in blue marker (grading 10/10). Encapsulated by SGC, with the signature certified as "Authentic" by JSA. As was his custom when signing yellow Hall of Fame postcards, Robinson has penned his name on the reverse, adding the salutation "Best Wishes" above his signature. Please note: the lines that appear to be on the reverse of the card are actually light scratches on the holder. The card remains in Excellent to Mint condition.