Quiet Street Antiques of Bath has dated this piece to the Regency era.
Complete with working lock and two working keys.

This is a very rare tea caddy, almost certainly Continental and perhaps "Spa-ware" from the Belgian town of Spa in the province of Liege, where highly regarded souvenirs were made as early as the 17th century from local wood, which was hand-decorated and are now highly collectable.
Quiet Street Antiques of Bath has dated this piece to the Regency era.
Fine antiques at sensible prices
You can view the stock and full dealer information on the Quiet Street Antiques of Bath Profile Page