your colt trooper was produced in 1968.
It will be marked on the weapon.
Proofhouse.com has sn data.
50- 375 usd
about $600 to $900
your colt trooper mkIII was made in 1978.
Requires professional appraisal.
100-700 USD
value depends on overall condition................
Between $300 and $475.
50-500 usd
40-400 usd
50-500 uSD
Up to 600 USD
Proofhouse.com has Colt sn data.
100-400 USD depending on condition.
your colt trooper was produced in 1968.