Nichols & Stone Co. Windsor chair with label and stamp. Unique design with two spindles angled back onto a protruding part of the seat. No arms. Turned wood legs and rungs.
Yellow paper label features Windsor logo and text that reads "Since / 1857 / MADE OF SELECTED / NORTHERN HARDWOODS / NICHOLS & STONE CO. / "The Home of Windsor Chairs" / GARDNER, MASSACHUSETTS" A1 is listed in the top right corner. 891 is handwritten in the bottom left corner and 020 in the bottom right corner. 20 is burned into the wood as is the Nichols & Stone Co. logo.
Likely made later half of 20th Century based on logo: https://www.vintagefurnitureguide.com/nichols-stone-furniture/