If the bottom of the magazine is solid, and when you open the action you see sheet metal feed lips at the bottom of the receiver just under where the bolt slides, you have the 8x57 model. The more common 8x56R version has an opening at the bottom of the magazine where the clip falls out when empty. The cartridges are completely different and cannot interchange. The M95M designation also appeared on some early model M95 rifles in 8x50R caliber that were modified to take the 8x56R cartridge in the 1930's, so you can't go just by the markings.