Fifty years ago, Valextra forever transformed the world of travel when it invented the pilot bag—a weekend suitcase designed to hold work papers and a change of clothing. Now the company has introduced a complete collection of leather luggage, available at its new Milan shop (3 Via Manzoni; 39-02/9978-6000) and Bergdorf Goodman (212/ 753-7300 or 800/558-1855;