The Real Wood Furniture Company has dated these Comb Back Windsor Chairs to the 18th Century.

width at feet : 45-48cms (17.5” - 19”)
width atop comb : 44-45cms (17.25”-17.5”
height : 89-90cms (35”-35.5”)
depth : 47-48cms (18.5”-19”)
seat height: 43-45cms (17”-17.5”) seat depth (from bottom of splat to front edge of seat) 37-38cms (14.5”-15”)
The Real Wood Furniture Company has dated these Comb Back Windsor Chairs to the 18th 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