Quoted from Charlie's "Book":
"D - First Serial 1858, Gun Count 1804, Early guns with "D" quality code have damascus steel barrels, but the quality or grade is inderterminate, majority of these have serials below 6000."
"D2 - First Serial 3830, Grade 2 guns (grades E,F,G, and H) with damascus steel barrels."
"D3 - First Serial 4975, Grade 3 guns with damascus steel barrels."
"D4 - First Serial 4983, Grade 4 guns (C grade) with Damascus steel barrels."
"D5 - First Serial 4982, Grade 5 guns (B grade) with damascus steel barrels."
"D6 - First Serial 5083, Grade 6 guns (A grade) with damascus steel barrels."
I don't understand where we arrive at "Dollar" from the "D" designation, especially where "T" indicates "Twist". To me it appears that the "D" designation, whether stamped on the barrel flats or in a book for "GRA" (grade) indicates Damascus.... but I may be wrong...
