Tenor horn. Nominal pitch: F|/|E♭.

https://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~76607~185206/full/,150/0/default.jpghttps://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~79120~185205/full/,150/0/default.jpg