The present watch is fitted with the rare barillet-type movement with a rotating pinned cylinder as opposed to the more often used "sur plateau" movement with a flat rotating disc. Although requiring more space and hence a more voluminous case, the pinned cylinder movement is more robust and generates a richer tone.
The barillet-type movement with pinned cylinder was invented by the watchmaker Antoine Favre-Salomon in Geneva in 1796. He replaced the stack of bells in use at the time by a comb with multiple pre-tuned notes. Together with a horizontally placed pinned barrel this system generates more varied and complex sounds.
This watch has an identical musical movement to those made by Perrin Frères of Geneva in the early 19th century and can therefore be possibly attributed to that workshop.