A 328 game winner across 12 major league seasons, John Clarkson was elected to te Baseball Hall of Fame in 1963, an honor delayed for no apparent good reason. He's with Chicago on this N172 pose, designated as 78-3, dating this example to 1887 as he was with Boston and the Beaneaters in 1888. PSA has assigned a numerical grade of 2, which encompasses not only the image but the entirety of the borders and reverse.  The picture is a nice one, with good tone and contrast present, a fine looking specimen with an image far superior to the technical grade.