Hi Doug,
Not much help here, & you may have already seen these but here are some past auction results with "some" info. Also a Net54 thread about baseball advertisements that includes Bell Brand - cards though... Still Neat - scroll to bottom.
http://www.legendaryauctions.com/Lot...entoryid=28249
http://www.legendaryauctions.com/Lot...ntoryid=125979
http://www.net54baseball.com/showthread.php?p=1009281