need help dateing and pricing a engraved 657 41 mag.it has never been shot.The serial # AUD6438 I bought this pistol for 1500 dollars close to thirty years ago,and its been a safe queen since.In fact the urge was so great to shoot it that i went out and bought another one. of course blued and not engraved like the other.its in great shape also.The serial # is N390960.It has C.C on cylinder.I have no Boxes nor paperwork on firearms.I will list the engraved one at a later date for sale once i get my camera working again