Basset horn, incomplete. Nominal pitch: probably F.

https://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~80293~188287/full/,150/0/default.jpghttps://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~80294~188286/full/,150/0/default.jpg