You have to state whether it is a handgun, rifle, or shotgun and then whether it is a bolt action, semi-automatic, single action, double action or pump action.
Go to Colt's website and request a manual.
about 1927
1927
Best to ask a gunsmith for assistance.
1927-1969
1927
1911, and remodled in 1927
1927
1927.
Made in 1927.
You really need the services of a good gunsmith
if your colt 25 auto is a model 1908 hammerless,it was made in 1927.