This little tin box would have held a Royal Navy warrant document for Warrant Officers. As far as I know they were introduced into RN service in about 1820. The Admiralty seal is impressed in the body of the box, which, along with the lid, are both constucted of tin with lead solder seams.

This poster describes the form of Queen Victoria's procession from Buckingham Palace to St Paul's and back again on the occasion of a thanksgiving service for the recovery (from typhoid) of Edward, Prince of Wales (later Edward VII). It lists the various militaray units, ambassadors, and civic dignitaries, etc who accompanied her.