A 19th century Russian silver and niello work snuff box

A 19th century Russian silver and niello work snuff box, maker's mark of I Kaltykov, assay master Nikolay Dubrovin, Moscow, 1820's, shaped rectangular form, the hinged cover with a scene of an officer by his carriage giving money to the poor, the base with a scene of a port, traces of gilding, length 7.6cm, approx. weight 2.5oz.