Scott 2015 Standard Postage Stamp Catalogue Volume 5: Countries of the World N-Sam (Scott Standard Postage Stamp Catalogue Vol 5 Countries N-Sam)

More than 13,000 value changes were recorded in Volume 5, which includes countries of the world N-Sam. A thorough review of Russia resulted in more than 6,000 value changes. Values are generally up for issues from the 1930s into the 1960s.
Other countries with significant value activity include Rwanda, St. Kitts, and Samoa. In St. Kitt s more than 850 changes were made, with increases for issues from 2001 to 2010. More than 1,500 changes were made in Samoa, with substantial increases for classic issues.