1851 Great Exhibition: Official Catalogue: Class X.: W. H. and S. Jackson
32. JACKSON, W. H. and S., Red Lion Street, Clerkenwell - Inventors and Manufacturers.
Registered soliclave lever watch: exhibited for cheapness and various improvements. Specimens in gold of various styles; specimens in cases enamelled, set in gems, and painted with designs the enamelling the work of this district.
A gold three-quarter plate lever watch, with enamelled dial, jewelled in six holes, of the same construction.
Gold lever watch, with compound balance crystal dome, showing the motion of the escapement.
Duplex time piece with whole or dead seconds from centre; a new calibre.
Lever watch, with whole or dead seconds.
Gold pocket chronometer.
Two-day marine chronometer, and a compensation balance, with adjustment for extremes of temperature.
Parts of watches, showing their construction.