2012 Scott Standard Postage Stamp Catalogue, Vol. 4: Countries of the World J-M

There are value changes in almost every country in Volume 4. The countries with the most value changes are Malaya and Malaysia, with more than 3,200. In addition to thousands of value changes, more than 1,000 new values have been added in Laos for used stamps between Scott 317 and 1381. Other countries with large numbers of changes are Libya, Morocco, Martinique, Montenegro and Macedonia.