No confusion. After 1961 when the "357" was dropped and the .357 Magnum chambering was added to the Trooper line, the Trooper had a frame-mounted firing pin. I assume the Trooper you mention is a .357 Magnum, correct?
The pencil number inside the stocks is a puzzle. I have never seen any Colt with target stocks that has any such number.
The pencil number inside the stocks is a puzzle. I have never seen any Colt with target stocks that has any such number.