Neapolitan Mandolin.

https://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~75092~182645/full/,150/0/default.jpghttps://images.is.ed.ac.uk/luna/servlet/iiif/UoEart~2~2~75378~182646/full/,150/0/default.jpg