The first and second editions included a comparative table of the catalogue numbers used in this catalogue and those used in the major stamp catalogues of the world (Stanley Gibbons, Scott, Michel, Yvert&Tellier).
Due to copyright problems, it is not possible to include this table any more and collectors are referred to the tables in the first and second editions or the table below, which is the one used in the first edition except for BAT which is from the second edition.
Below the catalogue numbers in other stamp catalogues you will find the listings of catalogue numbers altered all the way from the first edition until the latest edition.