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1917
1917 for the Colt model 1908 hammerless .25
That Colt model 1911 was a commercial model, not a government model and based on the serial number, it was made in 1947.
about 1948
That Colt was made in 1943 by Remington Rand under cotract to Colt Mfg. Co.
You will have to call Colt to find out. SN data published does not cover it.
1929
You will have to call Colt with the serial number to find out.
The Colt 45ACP National Match with serial number 17235-NM was manufactured in 1969.
Need to know if it is a derringer or rifle.
You will have to call Colt with the serial number.
You will have to call Colt with the serial number to find out.