This lot presents a pair of single-signed baseballs honoring the most celebrated battery in World Series history. Don Larsen's ball is signed boldly in blue ballpoint, accompanied by the inscription "Oct-8-1956" — the exact date of his perfect game in Game 5 of the 1956 World Series, the only no-hitter ever thrown in postseason play. The signature is clean and strong, with light overall toning consistent with age.

The companion ball carries Yogi Berra's familiar abbreviated signature in purple ballpoint pen, exhibiting excellent eye appeal with only trace handling marks. Both are official league models with traditional red stitching. Paired together, they commemorate the iconic pitcher-catcher duo from the most famous perfecto in baseball history, with Larsen's milestone date inscription complementing Berra's signature as the man behind the plate. JSA has authenticated both autographs, making this a compelling pairing for any postseason or perfect-game collection.