It’s incredible that this 1949 Bowman window ad sheet, meant to be stuck inside a window with pre-applied glue, survived intact.
In their May 2000 catalog, Mastro auctions described this 20” x 5-3/4” piece as in near-mint condition with a fold in the center, as manufactured. It features 16 of the set’s 240 “upcoming” cards.
One contributor on the net54 boards said these were displayed in candy store windows in the Philadelphia area in June 1949.