George Hunzinger furniture fans will probably be interested to see this chair design by him based on the 1869 brace patent. This is not a common form and I personally haven’t seen one in the past. You can see the chair without arms in the Hunzinger book on page 66.
Of interest to me are the ebonized touches in the incising and in the crest as well as the rear leg shape.
The sale ends today and currently there are no bids at $500. The photos at the listing don’t show much do to the darkness, so I have lightened a few below.