1950
the 45. colt combat commander i worth from 1100.00 to 9000.00 depending on the gun research carefully.
It was made in the 1970's and the BS means Blued Steel. Probably a Colt Combat Commander. Worth about 600-800 dollars depending on condition maybe more.
Colt was one maker who made the GATLING gun.
Legand has it Samuel colt made a gun that could kill anything
1924
Potato Digger
If you want to know when it was made, you need to call Colt.
Colt makes a 1911-A1 Pellet gun made by Umarex. I know of no BB gun unless you are asking about an Air Soft gun. The Pellet gun is very good. I can not answer about an Air soft gun.
You will have to call Colt to find out.
about 1973
1873
The repeating hand gun