PSA mislabeled this Exhibit?
 

Is this not a 1925 (blank back)? 1926 different image and blue??

Greg, you are correct - 1925 Exhibit.

1926 has slight tint? Different photo?

1925 or 1926 Johnson Exhibit
 

The 1925 and 1926 Exhibits of 74 cards are identical to each other except for the color tint. Walter Johnson is in this group. The 1925 Exhibits have a black/white tint and the 1926 Exhibits have a blue/gray tint. You cannot make any judgement with scan photos since the scanner can distort the color somewhat. The only true way to determine the correct year is to have both cards side by side in their holders.

1927 here!

In my experience, the 1925 Exhibits have the player information in a box, while the 1926s have the player information directly on the photo. Isn't that an easy way to tell the difference? Or am I completely wrong?