Forerunner (stamp)
In philately, a forerunner is a postage stamp used before a region or territory issued stamps of its own. The term also includes stamps of the political predecessors of a country. For instance stamps of the state of Western Australia are forerunners of Australia today and stamps of the British Mandate for Palestine are forerunners of modern Israel.
Read more about Forerunner (stamp): British Colonies, Propaganda Stamps, Provisional Stamps