3DB was Melbourne's first radio broadcast station and the first children's show was conducted in 1927by Winnie Wattle. Gertie Gumknut is believed to have been an accompanying personality. The bookmarks were produced in Melbourne and advertised a range of businesses in these examples Burrows pharmacy and Ace advertising agency.The heads of the characters represented on these bookmarks have been torn off. Nilbookmarks, gertie gumknut, winnie wattle, 3db, radio, melbourne