[goheels]

No doubt it is an MB. The back is diagnostic, but also the border. I will post some detailed pics later but the cut line (thinner, off-white) which was intended as a marker to help cut half sheets in the regular 68 issue is often confused with the MB border. The controversy a few months back where PSA graded the Ryan as an MB happened because they confused a cut line with a true border. In the end the card was properly declassified as an MB.

On the Dodgers card the white border at the top is actually the lower part of the Kocourek 88 football card. Had the card been off centered to the top, therefore with a white border at the bottom, that would be part of the Mustang Karavan 17 Hot Rod card.

Cards on the extreme left and right ends of the sheet could have white borders, but so did the regular issue cards, if they were off centered. That would not be possible for this card as it occupied the 2nd from the left position in its row between the left most card (107 Check List Brown Fine Mesh) and the 3rd card in the row, Larry Jaster 117.