It appears to be an early post war actual Mauser sporter, based on stock shape, buttplate and grip cap. These were not the pre war commercial exquisite guns made at the oberndorf factory, but rather, unused military parts assembled into new sporters. You can see the turned down military handle and round bolt knob, bottom metal front of trigger guard filled in where the sling swivel hole was. Early Williams (started 1926) sliding rear sight (outsourced or replaced later) but what appears to be original pre war front sight and hood (rare if original hood).
Action being military is probably good, maybe very good, but not of the tight pre war tolerances. Sling swivel again indicates transitional period as the swivel and stud are pre war, but the band is too wide and squared off showing early post war signs. Polyurethane coating, may be applied at a later date but can be removed and oil filled nicely.
In my opinion, this is a good gun at around US $ 500-$750 if the barrel is in good condition. It has potential for a good rebuild to a 404 or 30-06.