Sounds like 65818 was made up as a G grade and was already on hand. Then an order came in for F or E grade and two new side plates were fit and finished to make the gun in stock an F or E grade to fill the order. Not wanting to waste anything the take off side plates were returned to stock (bin). Later they were used to finish 69767 as a G grade.
We often say that if these guns could only talk the stories they could tell would be interesting. I had a H grade that had blued barrels. Factory I am positive. But when the gun was refinished we found one barrel was twist and one was damascus. Now I wish that I had kept that gun just for the odd feature. I saw another DS grade, clearly marked as DS, that had damascus barrels and dolls head rib extension but no indicators. It was not a late parts clearing gun but one of the very early ones. I figured it was run up from stock parts before the features of the grade were firmly set. I passed on that gun because the owner wanted more than a grand for it when mint DS guns did not bring half that much.
