1913-1915 Pinkerton Postcard #505 Connie Mack-Blank Back. It has been graded and encapsulated by SGC GD 2. It is a clear black and white image of Mack leaning against a railing in his traditional hat and suit. The card is well centered with fairly smooth edges. All four corners have slight rounding. The blank back has scattered soiling and Guy Coomer Mar 1 1914 written upon it.