1818—Leipzig, Germany

Advertisement appears in the German publication Allgemeine Musikalische Zeitung, stating that Stölzel and Blümel have invented a trombone valve enabling trombonists to play all notes of the chromatic scale. However, according to Nemetz, the Viennese maker Riedl is actually the first to apply the valve system to the trombone (Carse, Musical 258).