Scott 2009 Standard Postage Stamp Catalogue, Vol. 5: Countries of the World- P-SL

A record number of value changes have been made for 20 countries in Volume 5. The value change leader is Romania with 4,779. Other countries with large changes are Russia (4,148), San Marino (2,916), Saudi Arabia (2,611), Poland (2,410) and Sierra Leone (2,104). More than 1,000 value changes have been made for 15 different countries.