1851 Great Exhibition: Official Catalogue: Class X.: Dell Brothers
100. DELL BROTHERS, Bristol — Inventors and Manufacturers.
Specimens of ordinary clock-work. Transparent timepiece for the bed-room: a small light is placed behind the dial, showing the time distinctly; the time-piece has a lever escapement, going two days.
Specimens of iron and brass wheel-cutting, for clockwork, lathe-work, etc.; and wood-pattern cutting, for cast-iron and other wheels.
Pianoforte music-box, playing six overtures, made by Nicole Freres, of Geneva.