Solid silver hallmarked sterling silver which is 925 small stamp case beautiful item unfortunately no makers mark or year mark but clearly sterling silver 925 parts per 1000 this one has lovely hand engraving and a unmarked cartouche some age related wear 
3 cm wide 2 1/2 cm height 
The history of silver stamp cases includes the development of stamp dispensers and the production of stamp boxes: 
 
Stamp dispensers
Silver stamp dispensers were first made in Britain around the turn of the century. They were typically circular, cylindrical, or oval in shape, with slits for accessing stamps individually. The United States has used stamp dispensers more than other countries, and often has slits for both airmail and postage stamps