UPU mail: Annual tables of exchange rates and of postage rates to the U.S, 1881-1953 as exemplified by short paid matter (Philatelic research library), spiral bind, illustrated, 186 pages, A4 format, condition: very good.

The International Bureau of the UPU has published postal statistics regularly since the first edition in 1875. It thus holds the oldest records of international statistics collected by an international organization. These statistics have been amended and improved to meet as closely as possible the postal sector's expectations and need for information. 

The aim of these postal statistics, in addition to providing a single source of information on data, is to serve as an analytical working tool at both the international and national level. At the international level, the data make it possible to deduce general trends in postal traffic and the means used to handle this traffic. At the national level, data can be used by posts to effectively manage and plan their services. 

The UPU's statistical database provides a dynamic overview of postal development in each country. It contains data from over 200 countries or territories.