The records i have only go up to 1978 with a starting number of 1001L
your colt trooper mkIII was made in 1978.
about 1973
1972
Colt data at Proofhouse.com
No serial number provided.
Around 1973.
1958
100-500 USD
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.
You must call Colt to find out.
Call Colt, Blue Book of Gun Values
Between 1971 & 1972