Congratulations on your new Colt. It looks great! You are gonna need to wear SUNGLASSES to shoot the shiny gun! I have a couple older target Colts and they are great shooters. You might post your gun's serial number like this: 1234xx Several here may have the information (or a link to it) you desire.
The serial number will make it possible to date your gun. Calling Colt (during the week) is also a great way tho get the info.
Here is a link if your gun's s/n falls within the year dates of manufacture.
Serial Number Data