The last edition of SCD lists variations for all 3 of the 52 double prints. In each case the stitches on the back baseball always run right or left on the Mantle, Robinson and Thompson. But as Ted points out, the Mantle, and the Robinson and Thompson also have front differences. On the Mantle, for me, the easiest ones to spot are the top of the box star line is wavy or straight, the e in the auto is truncated or not, the black border at the top has tails, or not, and the pixel shows on the left or not
