Bild Photo of Penny Singleton as Blondie and Arthur Lake as Dagwood Bumstead from the radio program Blondie. The photo was sent to announce that the program would now be carried on the Blue Network. By Blue Network. The Blue Network was originally owned and operate by NBC Radio. NBC was forced to sell its Blue Network in the early 1940s because it was ruled that having two networks, Red and Blue, constituted a monopoly. After the network was sold, it operated under the name of the Blue Network for some time before becoming known as American Broadcasting Company-ABC. - eBay itemphoto frontphoto back, Public Domain, https://commons.wikimedia.org/w/index.php?curid=19323752
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