Camden Antiques has dated this piece to the 1850s.

Dimensions:
Width 47cms
Depth 42cms
Overall height 87cms
Seat height 46cms
Robert Gillow served an apprenticeship as a joiner. During the 1730s he began to exploit the lucrative West Indies trade exporting mahogany furniture and importing rum and sugar. Following his death in 1772, the business was continued by his two sons, Richard (1734–1811) and Robert (1745–93). In 1764 a London branch of Gillow's was established at 176 Oxford Road, now Oxford Street, by Thomas Gillow and William Taylor. The firm rapidly established a reputation for supplying high-quality furniture to the richest families in the country.
Camden Antiques has dated this piece to the 1850s.
You can view the stock and full dealer information on the Camden Antiques Profile Page