50-500 usd
About 1968/1969.
100-700 USD
Proofhouse.com has Colt sn data.
your colt trooper mkIII was made in 1978.
where do i fine serial number on acolt trooper 357 magnu .I lookes on the frame and but and all it says it 357 magnum ctg.
50-500 usd
40-400 usd
Between $300 and $475.
50-500 uSD
value depends on overall condition................
Up to 600 USD
Where will be marked on the barrel or receiver. When is 1977.