 The British Library Philatelic Collections and the postal museums in Stockholm, Paris, and Bern had unique national philately collections at that time, and among the famous private collections are those of the Royal Philatelic Collection, F. Ferrari (Austria), M. Burrus (Switzerland), A. Lichtenstein, A. Hind, J. Boker (USA), and H. Kanai (Japan).In the mid-1970s, national philately organizations and associations existed in most countries, and 150-200 million people were involved in philately during meetings established.From August 28 to September 1, 2004, the World Stamp Championship was held for the first time in the history of world philately in Singapore.