1840—Karlsruhe, Germany

Gustav Schilling, a German music lexicographer, author, and editor, publishes his Lehrbuch der allgemeinen Musikwissenschaft. The book provides information about the alto trombone, including a position chart, shown below, clearly showing an instrument in E-flat. The chart, which starts with seventh position (labeled a) and proceeds chromatically up to first (labeled g), seems to be inaccurate for seventh position, but clearly points to an e-flat alto trombone with all the other positions (see below image; public domain) (Schilling 59).

*