No serial number provided.
1949
mfg date about 1921. value depends on overall condition................
rc46661
You will have to call Colt to find out.
10-500 USD depending on specifics
Would need the serial number to answer.
You will have to post the sn or call Browning.
Proofhouse.com has Colt serial number tables.
After 1978. You will have to call Colt to narrow it down further.
1915
Around 1912.
your colt trooper mkIII was made in 1978.