A very nice rifle. These sorts of rifles were built by very experienced gunsmiths who had trained for many many years, using the best available materials. Inletting would have been done the proper way - with smoke and time. The wood selected for its strength and stability, having been properly seasoned for many years. Then when making the stock it would be part inlet and part shaped and put to one side for several months to let any final stresses and strains disappear. Then its fully inlet.
Scope mounts will have been properly fitted to both the rifle and the scope, ie lapped for perfect contact. And the whole rifle would have been regulated to a particular ammunition as specified by the customer.
It would then have been rust blued and oil finished again over a length of time.
It would have been spectacularly accurate and reliable for its time.
It’s a rifle that is old and has been used. Like a fine lady and should be treated as such. By all means craft a fine leather lace on cheek piece. If the stock is a bit long, move the scope back a bit.
But If you want fur coat, nae knickers and big tits buy a 6.5cm with anodised chassis system and free floating barrel. Looks nice in the pictures, shoots well, but after a bit of use get really scruffy and bloody horrible to carry about and live with.