TC Hawken Mfg Dates

Just wondering if theres an accurate way to date when a TC Hawken was produced,I have one now that has the clean out screw and a six digit serial number(279xxx),this one is "minty" shot about 10 times

 

[lonewolf5347]

I have 2 t/c both 5 digits the Hawkens bought from the original owner mid 70's
Renegade flinter 54 kit gun also has 5 digits
I would say your barrel aound the late 70's

 

[Rat Trapper]

Does anyone know when TC started putting the BP warning on the barrels? When were the clean out screws discontinued?

 

[Russ T Frizzen]

I have an early Seneca and it doesn't have the warning. But I don't recall when the Seneca was first sold.

 

[Rock Fish]

I have a pre warning T/C Hawken ser 197XXX. I believe it may be a Douglas barrel.