1850s—Vienna, Austria
K.K. Ungar: Regiments Feldmusik, a print published by Anton Paterrno, includes both a standard trombone and a rear-facing trombone (see detail and full image below; public domain) (Ryan 419).
K.K. Ungar: Regiments Feldmusik, a print published by Anton Paterrno, includes both a standard trombone and a rear-facing trombone (see detail and full image below; public domain) (Ryan 419).