I just have this Exhibit card of Charlie Gehringer that Buck used as a postcard to write to fellow collector Jake Wise in 1948. I already posted it a few months ago in my post on the issue date of 1948 Bowman baseball (here:
http://www.net54baseball.com/showthread.php?t=223647). I also have a few hobby publications addressed to Barker, which is not quite the same thing, but they're also things he once owned.
