To find out the age and value of a 50 cal Thompson Center Thunderhawk one will need to call the maker or take the gun to a dealer. You can even call a dealer and give them the serial number 20752 and they may be able to look it up.
t/c contender serial number 308905
The Thompson Contender with a serial number of 7000 was made in the year 1967. Thompson/Center Arms is a firearm company that is based in Rochester, New Hampshire
Contact Thompson Center Customer Service at 1-866-730-1614
No way to tell from just the serial number.
You will need to contact Thompson Center Customer Service thru their website.
50-300 usd
Thompson Center does not publish date ranges for there guns, but from the number I would estimate the date to be mid 90's
In a TCA, if it has letter preceding the serial number, it was made after 1971.
Frame
No sn data I know of.
About tree fiddy
It's a 54 caliber round ball