Trade catalogue, J. Smith & Sons, St. John's Square, Clerkenwell, London, 1865, fig.89.
Derek Roberts, English Precision Pendulum Clocks, Schiffer 2003, pp.235-236, figs.22-9A-D.
Established in 1780 Smith and Sons of Clerkenwell were one of the most important manufacturers of clocks in mid 19th Century England. In a lengthy article in the Illustrated London News of 20 September 1851 Smiths were upheld as a good example of modern production methods and particular note was made of the advantages large operations such as Smith's held over smaller operators (see Derek Roberts, British Skeleton Clocks, Antique Collectors' Club, 1987, pp.260-267). The present regulator would have been one of the finest Smith's produced. See also lot 32.