Certainly looks like a Zi-Di rifle to me, but maybe a deluxe version or one with a custom stock. I have two of these in 5.6 x 32 and a third in 6.5 x 52. I think the last converts to the US .25 Remington but haven't yet found any vintage ammo to confirm that. All three of my rifles have uncheckered forends and the lines are not as pleasing as the rifle pictured above. They are sweet feeling little rifles.