The Antique Partnership has dated this piece to the 19th Century.

A very unusual secret compartment with two storage areas and a swivel top sovereign ? box. The compartment is accessed by sliding a blade under a vertical panel to lift it...it can then be removed by hand to access a further panel housing the concealed storage.
Working lock with original key.
51 cm wide by 24.5 cm deep and 17 cm high when closed
Open it measures 51 cm by 51 cm and max 13 cm high.
The Antique Partnership has dated this piece to the 19th Century.
You can view the stock and full dealer information on the The Antique Partnership Profile Page