Colour poster, titled "MILESTONES IN AUSTRALIAN HISTORY / 1880 / VOICES AROUND THE WORLD / ...(a text block briefly describes the development of telecommunications) / Today: / TELEPHONE SERVICES LINK TOGETHER / THE PEOPLE OF ALL NATIONS". The drawing depicts two women working in an office. One is seated at a table, and the other is standing and operating a telephone exchange switchboard.

This collection consists of 87 items from the New South Wales historical section of Australia Post. The items range from furnishings that were used for the opening of the Sydney GPO in 1874 to telephones, signs, posters, and postal boxes. The material covers a period of over one hundred years of postal service in Australia.