Two Engelstuhl chairs curved wood and canning Thonet or Hoffmann

Pair of curved wooden chairs and traditional hand caning. Probably edited by hofmann. So-called "engelstuhl" model also produced by tuna. Overall, they are in very good condition, although they have marks of the time. The canning is in good condition. I think the screws that hold both feet at the front of the seat are not original and have been added (see photos). More information and/or photos on request.