It is a 91/38, but it looks to be a late war issue item as it has the simple fixed rear sight on it instead of the elevation adjustable rear sight. Here is a quick guide to Carcanos and their markings:
https://surplused.com/index.php/2012...-rifle-models/
You might want to double check the caliber on it though. Some of them were for 7.35x51 cartridges and not the regular 6.5x52 ones.
I found that the stock military sights are set for 300 meters and the later ones set for 200 meters. So if you try and shoot at a target closer in, the bullets are likely to go over the top. I put a scope on one of mine and it turned out to be a great truck gun for the farm or ranch. Plenty accurate enough for hogs, and predators.