The straight bolt handle to me indicates a low number bolt and ergo a low number receiver; immaterial to me for shooting but a good bargaining point with an owner who doesn't value them. The issue front sight indicates an issue barrel, possibly another bargaining point with an unknowledgeable owner. The long-slide 48 and the European-type sling swivels are also indicators of an early rifle; all in all it appears to be very possibly an early NRA sporter as already suggested. The stock doesn't have the early reinforcing side panels but does have an early-type schnabel tip, and appears to be extremely well made. I don't believe it's a modified issue stock, rather it appears to be a plain but well-made replacement done by an expert.
Without seeing the details up close and personal, I'd offer at least $500 and maybe up to $1000 or more if the details proved interesting. It looks like a sleeper. I'd look for locating pins on the bolt sleeve first; if present, they'd indicate expert or at least knowledgegable workmanship in the conversion.
Interesting, regards, Joe
