100-400 USD
No way to assess worth with only the serial number.
Proofhouse.com has Colt sn data.
50-300 usd
With a letter in the serial number, I doubt if it is a genuine Colt. Probably manufactured in Italy sometime in the 1960s or 1970s.
Impossible to value with only the serial number and no other information.
what is a 1978 .38 special colt cobra serial #m52453 nickel plated with pearl handle worth?
50-150
100-1000 usd
10-800 USD depending on specifics
read information on top of barrel. If it 'says' Colt mfg co, then it is a colt. If repro from Italy t will so indicate.......................
Proofhouse.com has Colt sn data. Might be worth the money to get it lettered by Colt
1891. IMHO, worth spending the money to get it lettered by Colt.