Yes. I've heard of it.
2000
The Thompson Center hawken that I have,has a barrel that is 28 inches long.
2000
On 90% of the guns it is stamped on the right side of the barrel as "Thompson/Center Rochester New Hampshire" and "HAWKEN 45 Cal" along with a serial number on the left side. If not the easiest way would be to go to gunbroker.com or Google and search for Thompson center hawken, compare the pictures and description to what you have.
The Thompson Center Hawken rifle with serial number 66841 was likely made in the late 1970s to early 1980s. Thompson Center Arms began production of the Hawken model in the mid-1970s, and serial numbers from that era can help narrow down the specific year of manufacture. For an exact year, consulting a Thompson Center production records or reference guide would provide definitive information.
You can download manuals from the Thompson Center website listed here in the related links, you can also find a phone number there to request a hard copy. You will need to know the model. In this case the 25th anniversary Hawken, same specs apply as the standard Hawkens rifle.
100-400 USD or so
You must call TC
You will have to call TC to find out.
It's a 54 caliber round ball
100-400 USD
In a TCA, if it has letter preceding the serial number, it was made after 1971.