The Real Wood Furniture Company has dated this Antique Windsor Armchair to the 19th Century.
(See: ‘The English Regional Chair’ by Dr Bernard Cotton (Antique Collectors’ Club) - index of Thames Valley chair makers)

Restoration to feet which have been tipped.
width at top comb : 65 cms (25.5”)
width at armbow : 56 cms (22”)
height : 116 cms (45.5”)
depth (from back of top hoop to front of legs) : 68 cms (26.75”)
seat height: 46 cms (18”) between front arm supports: 41 cms (16”) seat depth (from bottom of splat to front edge of seat) 51cms (20”)
The Real Wood Furniture Company has dated this Antique Windsor Armchair to the 19th Century.
The real wood furniture company (chris baylis) sells windsor chairs, decorative furniture and objects from large showrooms in the cotswolds
You can view the stock and full dealer information on the The Real Wood Furniture Company Profile Page