SN 74217 all matching numbers except for wedge (1770). Clear barrel address and cylinder scene. Frame marked Colt's Patent U.S., Several Military inspector's markings; A&T on barrel, S&R on recoil shield, M&V on trigger-guard, M on backstrap. Clear inspector's cartouches on grips, On right side WAT for William Anderson Thorton on the left side JH for John Hawkins