Autococker 07 and K22 fan got it; Nice going guys. These originated as Austro-Hungarian military rifles in 8X50 R. After the Treaty of St Germain des Près which ended World War I with Austria-Hungary, these rifles were largely distributed throught the balkans, and Italy got enough of them to arm their troops in their colonies with them. The Kingdom of the Serbs, Croats and Slovenes, later Yugoslavia got a bunch. They liked the rifle but wanted to stick with the 8X57 German military cartridge, so they rebarreled their rifles and worked over the magazine. They put new bolt heads and extractors on them too, restocked them and developed new sights.
These rifles saw VERY hard service in WW II with Tito's Partisans, and most of them are in NRA boat anchor condition. If you have a presentable one, you have a pretty rare bird.
The weak point is the extractor, which is very liable to breakage. The design is different than the 8X50R extractor and probably the mettalurgy is different. Many rifles are found with broken extractors. Replacements are non-existent. If you shoot yours, extract the fired case very gently, and don't let the extractor snap over the rim of a chambered round. I shot mine a little, found it wasn't all that accurate and decided to retire it, primarily for fear of breaking the extractor.