1942 i think....go to www.coolgunsite.com, you can find out
Model 1911a1
Your colt 1911a1 was made by colt in 1945.
government model 70 45 cal
your springfield 1911 was made in 1914
Your 1911 was made by Colt in 1919.
The model 1911/1911A1 Governmental pistol with that serial number was produced in 1944.
50-500 usd
your colt model 1911A1 was made by colt in 1944.
Your 1911 was made by Colt in 1918.......... you may have a springfield slide on it...
500-800 USD
Your colt model 1911a1 was made in 1945,plus the serial number puts it in the range of the Remington rand numbers in my references.
made by Colt 1913. not unusual if you have a springfield slide on your Colt 1911