Without a picture of your gun it is about impossible to say what model it is. I am assuming the number you posted is the serial number on the barrel. You might try calling Thompson Center Arms in New Hampshire. They probably answer questions like this for free. Before calling suggest you look at their website for names of various models to help them help you. Robert with over 36 years black powder experience and owner of various T/C's.
Thompson Center Arms was created in 1965.
100-325 USD
100-300 USD depending on condition.
100-400 USD
Thompson Center is currently owned by Smith and Wesson holding corp.
The value of the Thompson Center Arms New Englander 12 gauge varies depending on the condition of the gun. On average, this gun retails in excellent condition for about 300 dollars.
100-400 USD or so
200-400 USD
100-400 or so
You must call TC
50- 250 usd
100-300 USD