Colt 1905 Military - The first .45 ACP, detailed above. Also the first with a 5" instead of 6" barrel. Early ones had the round hammer, later ones like mine had the low spur. Tested in small numbers by the US Army and selected for further development.
Colt 1907 Army - Added the grip safety and a loaded chamber indicator. 207 made.
Colt 1909 Army - Changed to the swinging-link barrel with slide bushing, added a manual safety on the left side, got rid of the loaded chamber indicator. 42 made.
Colt 1910 Army - Changed the angle of the grip to the 74 degrees we all know and love. Still has the safety on the right and a different shape to the slide cut-out. 12 made.
