The Colt Banker's special was created on the police positive frame. It began in 1928 & ran to 1943. About 35,000 were made.
A Colt police positive .38/bankers special with that serial number was made in 1934. A Colt police positive special/detective special with that serial number was made in 1928.
Don't know the value, but according to proofhouse.com a police positive special/detective special with that serial number was made in 1930 and a police positive .38/bankers special was made in 1939.
Your colt officers special was produced in 1951.
You will have to call Colt
You will have to call Colt to find out.
That Colt ds was made in 1975.
If it is a Colt police positive special, it was produced in 1910.
You will have to call Colt
your colt agent was made in 1963.
Proofhouse.com has Colt sn data.
The Colt police positive special with serial # 276069 was produced in the year 1923.
your colt detective special dates to the year 1949 by the serial number provided.