The Nolan Ryan/Jerry Koosman rookie card is the key to the 1968 Topps set and you would be hard pressed to find an example with better photography than this PSA 6. A slight skew to the bottom right when the holder is upright doesn't detract from a nicely centered image and four sharp edges.  The reverse presents glowing orange borders with a creamy white information box. One of the most popular 1960's cards ever issued, a sharp, clear and colorful example.