sporterized military Mauser , rest as Lüderitz said.If it´s really a Krieghoff produced in Suhl it has been produced before WW2.
After the war Krieghoff had to move to the West and is now located in Ulm.
The raised side panels on that rifle makes me wonder if it may have been built before the first world war?
Keep your eye out for another classic era used commercial stock. I have actually seen several come up on ebay and go for good prices. Very good in fact. Who wants them? Not long ago a nice one with Schnabel fore end went for a song. I bought this used Mauser aftermarket stock from GunBroker for a couple hundred and cleaned it up for my 404 build. I left the trap gun recoil pad on it (for now). Just fit it properly.
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Then you could swap out the safety for a Buhler scope relief safety and change the scope mounts. Those safeties can be had for less than a hundred bucks. Or if the new used stock is cut for it, you might install a trigger block safety. Timney sells them for about $150. It is a shame someone would do so many brutal modifications to a classic hunting rifle just to save a safety that in my opinion was extremely unfriendly for hunting to start with.