This is a 1949 French telephone directory, titled Annuaire Officiel des Abonnés au Téléphone for the Paris region. The thick book is printed in a simple, utilitarian style, listing alphabetically the subscribers of the telephone service at that time. The cover displays important emergency numbers, such as those for the police and fire department, as well as advertisements, including a prominent one for "Teprina," a company that guaranteed phone installations for 15 years. This vintage phone book is a fascinating piece of mid-20th-century communication history, offering a glimpse into a time when telephone directories were essential tools for connecting with others. It would make a unique addition to a collection of vintage documents or historical memorabilia.