Well said Jon. Just wanted to ascertain you were using the term damascus in the true sense & not generically to include twist. Coming from you I suspected that was the case, but wanted to confirm.
This is purely a wild guess, but I suspect those having true damascus were parts utilization. It is f course also quite possible as they were preparing to introduse the grade wome were made up with bbls at hand & may have been either twist or damascus. Perhaps they used up some with some type of "Appearence Blemish" but were otherwise sound bbls.