This 1955 Topps Sandy Koufax rookie card carries a signed autograph that PSA/DNA has graded a perfect 10, representing the finest possible quality for a signature on this iconic card. The 1955 Topps set introduced a redesigned, more modern look to the Topps lineup, and Koufax's rookie card within it stands as one of the single most important pieces in the entire baseball card hobby, marking the debut of a pitcher who would go on to author one of the most dominant peak stretches in the sport's history with the Los Angeles Dodgers, including three Cy Young awards, a perfect game, and four no-hitters before retiring at the height of his powers. Signed examples of this card are considerably scarcer than unsigned copies, as Koufax has historically been selective with autograph signings throughout his post-playing life, making authenticated signed rookies a genuine premium category within his broader autograph market. The PSA Authentic designation on the card itself paired with a PSA/DNA Auto 10 grade on the signature gives buyers maximum confidence in both the card's legitimacy and the exceptional quality of the autograph's placement and execution. For Koufax collectors and vintage rookie card specialists alike, a gem-quality signed example of this card represents one of the most desirable single pieces available in the entire hobby, combining historical significance with rarity and top-tier autograph grading.