Clarinet with pièces de rechange. Nominal pitch: C/B.

https://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~80310~187753/full/,150/0/default.jpghttps://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~78988~187754/full/,150/0/default.jpg