Fig 1 - 1912 Colt
Fig 2- 1915 Springfield- Notice "S" stamp
(Type used from 1911 to 1945)
Fig 3- 1918-1919 Colt
Fig 4- 1945 Ithaca - Spur is rounder
and sits out further
Fig 5- 1944 Colt - Spur
Fig 6- 1945 Remington Rand
Note: Compare Figures 2 and 7 side by side to look at the differences between the 1911 and 1911A1 Grip safety.
Fig 7- Post WWII USGI Replacement Part. Notice the "C" stamp in box