Anybody who opens the treasure chest 'Duo-Schatzkiste' will enjoy valuable gems of the literature for two clarinets. This volume contains original compositions from the classical and Romantic eras. Apart from well-known works, it also contains rare pieces which have been in hibernation for almost two centuries and are now available to the public for the first time. The present volume is aimed at clarinettists who possess profound basic knowledge. As material to be used in lessons, the pieces train the player's sense of style and the interpretation of music from the classical and Romantic eras. In addition, they deal with all aspects of duet playing, such as confidence in leading one's own part, performance for a balanced sound, intonation and improvement of the player's physical condition. These original pieces are also perfect for concerts, auditions, and competitions.