This piano carries the numbers 11544 (stamped) and 14479 (ink) which firmly date it to 1817.
The legs could be a 'fashion update' possibly c. 1830. After the piano fell from use as a musical instrument, and during its years of service as a sideboard, the pedal was mislaid, as so often happens. However, the instrument itself was evidently well cared-for, and the beautiful mahogany case looks good.
A pleasant surprise is to see that the green resonance-board has survived, complete with pretty gold flowers.
Internally, this one is exceptionally clean, and although it will need a throrough overhaul, all the bits appear to be there.
As far as we can tell from the pictures, the necessary work should be within the scope of a careful amateur.
The piano has been in a museum in Oxford for some years, where it may be viewed by appointment. The price is £550. Please contact the owner, Martyn Bettel