1958
Your colt trooper was made in 1966.
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.
made about 1965
Go to proofhouse.com
made about 1966
your colt trooper mkIII was made in 1978.
The information I have shows that your colt trooper was made in 1961,but it does not show the B prefix to a serial number.
Impossible to answer without a serial number
your colt trooper was produced in 1968.
Around 1970 based on proofhouse.com.
about 1963
Trooper model or 357 model serial # 68694 was produced in 1968. made about 1969