Tenor horn. Nominal pitch: E♭.

https://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~77050~183677/full/,150/0/default.jpghttps://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~78521~183675/full/,150/0/default.jpg