This pattern of chair with columnar supports and scrolled tablet derives from French chairs of the end of the 18th Century. The type was certainly produced by Gillows of Lancaster whose pattern book illustrates a very similar example (see: I. Hall, 'The Gillows Furniture Designs - II', Country Life, 15 June 1978, fig. 8)
A set of white-painted and parcel-gilt chairs with the same distinctive drapery-and-lozenge backs are illustrated in M. Jourdain and F. Rose, English Furniture, The Georgian Period (1750-1830), London, 1953, p. 63, pl. 16
When advertised in 1959, the set comprised seven armchairs