bob,is the reciever tapped ,the bolt handle does not look like typical j.p.sauer ,i do like the single trigger which is a a little unusual on a german gun , could you post a closeup of the bolt handle ,if it is original then i would not reblue ,if it has been changed ir could be changed back then reblue ,all in all rebluing wont bring any more for a sale then if you left it alone ...paul