Unbelievable volume of information on the world's classic stamps, Worldwide to 1950 and British Commonwealth to 1952. 1,213 pages, full colour. Listings for mint, used, mint NH, used on cover, used with certain cancels, pairs, strips, varieties, colours, etc., etc., etc. While the listed 2010 prices in the catalogue are a little LOW (unbelievably), what you'll learn will last a lifetime, and will be refunded by the knowledge you gain. New, the 2023 Classic Catalogue retails for $295.00 US. This is 'as new', barely used. The $50 price is not a cost, but an investment that will reward you forever. Why live in ignorance for such a bargain?