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Anson LytleExhibits offer some of the only action photos for the time. Additionally, many HOFers rookie cards appear in Exhibit format.
I agree with the above post. There are a lot of the post-47' exhibits running around. However, there are a lot less pre-war exhibits out there. The size may be a concern but perception changes over time. Not all that long ago, caramels were the redheaded stepchild of vintage cards.
I would guess that exhibits of HOF rookies, WWII era types, and rare variations will take off eventually.