You must contact COLT for the best answer.
What year is a trooper mark 3 serial 10192j.With the serial number that you have provided,your Colt Trooper mark III was made in the year 1975.
Colt data at Proofhouse.com
In 1978.
1972
go to proofhouse.com they have your answer.
100-700 usd
depending on the finish, between $170 and $495.
Proofhouse.com has Colt sn tables. You can also call Colt and they will tell you.
Proofhouse.com has sn data.
Unfortunately, there is no public database for newer Colt handguns. You will need to contact Colt customer service through their website.
without the letter 'j', made about 1966
40-400 usd