Vol. 4 of the 2016 edition of the Scott Standard Postage Stamp Catalogue (Countries J-M) contains almost 7,500 value changes. Almost all countries in this volume — Jamaica through Mozambique Company — show some value changes. Macao tops the leaderboard, with more than 1,800.
This catalogue covers Great Britain, Commonwealth and Empire countries 1840-1970. The listings include variations in watermark, perforation, paper and printing methods, major shades, watermark varieties, important plate flaws, errors and booklets. Edition 118/2016, 720 Pages