Clarinet with pièces de rechange. Nominal pitch: B♭/A.

https://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~80309~187755/full/,150/0/default.jpghttps://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~78987~187756/full/,150/0/default.jpg