Crimean Trench Art (inkwell)
Brass plaque with cyrilic script which translates as souvenir of Sebastopol.
Made from four steel shot of  0.9 inch calibre and one steel shout of 2.1 inch calibre
Curently, I cant say what what type of weapon these ammunition these are a signature of, although its possible one or both were cannister or grape shot.
The mass of the small iron ball ~ 2oz and the larger one is ~ 1.5 lb.