I would like to look at the headstamp. The language and notations tell a lot.
I am curious about the case mouth swell where the bullet is inserted. It appeared to have the bullet reverse, but it looks like the bullet inserted is larger than the neck and mouth of the case is expecting.
Based on the 'tapered' edges of the rim, I would guess a European cartridge. The .30-40 Krag round had 'squared' edges, as did the .303 British. Looking at the tapered case and 'squat' appearance, my first guess would be 8mm Lebel, but there is no annular ring. Could be a 7.62x54Rmm (Russian) round, but looks too short. One notes reversing the bullet was common for those rifles.