I believe this is a late 17th century c.1690 example of an armchair with the newly fashionable sloping backrest and therefore longer arms to compensate.
The frame is as solid as a rock - no movement in any of the joints. There are high-quality turned stretchers and uprights.
The front feet have considerable wear to their bottoms, which I think substantiates an early date and possible use on un-carpeted surfaces, 
The back legs are plain and made of a lighter timber, possibly a fruitwood, and show spliced, old repairs to both leg bottoms. These are neat and solid. There are about 20 old worm holes in the right back leg. These are very darkened inside, suggestive of very old infection, but I have treated them in any case.
The seating fabric is possibly Victorian and shows some areas of moth damage - see photos. The seat springing is good and comfortably supports a seated person.
I have pointed out all the issues, but really this is a fine and useable antique chair.
Height to centre of back is 38 inches and width between arms is 17 inches.

Collection only from Banstead, Surrey. 4 miles north of J8 M25.