Antique Furniture Direct has dated this piece to the Regency era.
The seat has been recently reupholstered in a tapestry fabric of floral designs. Solid and sturdy, would make a wonderful desk chair.

Construction/Wood:
Mahogany
Condition Report:
Solid and sturdy with wear and marks commensurate with age. Recently reupholstered (a couple of small marks to the fabric). A well-executed mend to the front leg (see photo).
Dimensions:
Width: 55cm
Depth: 56cm
Height to seat: 45cm
Height to Arms: 68cm
Height: 87cm
Antique Furniture Direct has dated this piece to the Regency era.
You can view the stock and full dealer information on the Antique Furniture Direct Profile Page