Best left to a gunsmith.
what's the question ???
A semi-automatic pistol chambered in 45 ACP.
How much is a old black powder only 45 cal long barrel pistol worth?
check out gun sites on line. look up the 45 1911 pistol and compare condition and prices to your pistol
50-200 usd
If you call Colt they will tell you when it was made.
No such thing. It is a typo. A 45 mm pistol would fire a bullet larger than a golf ball. I think you are looking for a .45 CALIBER pistol. That is a handgun that fires a bullet about 45/100ths of an inch in diameter. Perhaps the two best known are the 45 Colt Peacemaker type revolver of cowboy fame, and the 1911A1 .45 Automatic Pistol, used by the US Army.
100-450 or so
Colt has never made a 45/410 pistol
The 1911 pistol was first accepted into US military service in 1911. It fires the .45 ACP (11.65x23mm) cartridge, and operates using a single action mechanism. The M1911A1 made some minor improvements to the original design.
50-500 usd