Scott Catalogue is the #1 resource for identifying and valuing postage stamps.
Scott Postage Stamp Catalogue is the #1 resource for identifying and valuing U.S. and worldwide postage stamps.
The six-volume Scott Standard Postage Stamp Catalogue provides detailed listings and annually updated values for postage stamps released throughout the world. The Scott Specialized Catalogue of U.S. Stamps and Covers is the indispensable reference work used by collectors of U.S. postage stamps. The Scott Classic Specialized Catalogue of Stamps and Covers, 1840-1940 is recognized as the premier reference work for identifying and valuing classic worldwide stamps and covers.