Colt Diamondback year of production?

[mcshot]

Is there information available that shows year of production for Diamondback serial numbers? My limited search has turned up nothing for this model.
Thanks,
mac:( :confused:

[BADSBSNF81]

Yes. Find R.L. Wilson's book on Colt's date of manufacture. Post the first three or four digits and I'll date it for you.

[mcshot]

Thanks BAD.......,
The serial number is PO274X with a large U below it. Gun is new to me and 98%+ and a definite keeper. All the writing is gold accented, even under grips, and someone told previous owner it was anniversary model. I think it was a gold pen job.
mac