A Charles II chestnut and ash triform armchair late 17th century

the channelled back with shaped cresting rail and splayed laths, with boarded seat, the channel moulded legs joined by peripheral stretchers

The Rous Lench Court, Worcestershire (cited by Chinnery op. cit. p. 573)

Illustrated twice Victor Chinnery, Oak Furniture, The British Tradition, Woodbridge, 1979, p. 92, fig. 2:75 and 2:77a

and

Tobias Jellinek, Early British Chairs and Seats from 1500 to 1700, Woodbridge, Forthcoming (2009), pl. 140.

Very atmospheric. Some old fragmenting on the cresting rail and the splayed lathes. Arms with indents and scuffing. Separations and slight fragmenting to seat. Wear to legs and stretchers. Minor traces of old worm, some movement in seat frame. The colour and patination of the cresting rail is stunning.
"In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective, qualified opinion. Prospective buyers should also refer to any Important Notices regarding this sale, which are printed in the Sale Catalogue.
NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD AS IS" IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS PRINTED IN THE SALE CATALOGUE."

Chinnery writes (op. cit. p. 94), '...there are no English triangular backstools, but the lowback armchair is fairly common. This type [the offered lot] was made in a crude joined version, but examples are comparatively rare'.