Scott Standard Postage Stamp Catalogue 2004, Vol. 1: United States, United Nations & Countries of the World A-B

Almost 13,500 value changes occur in this years Volume 1. The stamps of the United States and its possessions lead the way with more than 2,300 value changes. Value changes for the United States are centered mostly among rarer items, and most value changes are increases. Action in the countries of the world A-B is centered around Australia, where more than 1,600 value changes were recorded. All told, more than half of the A-B countries had more than 100 value changes.