Based on proofhouse.com with that serial number, it would have been in the first year of issue, 1908
A Colt police positive .38 with that serial number was made in 1931 and a Colt police positive special with that serial number was made in 1928.
A Colt police positive .38 with that serial number was made in 1930. A Colt police positive special with that serial number was made in 1928.
About 1913 for a Colt police positive special with that serial number.
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.
what is the manufacture date of a .38 police positive special serial number b 81
Around 1920 for the Colt police positive special with that serial number
Depends on which Police positive with that serial number: Police positive special in 1919 Police positive .32 & target in 1922 Police positive .38 in 1928
A Colt police positive .38 and a Colt police positive special with that serial number were both made in 1913.
Colt police positive special with that serial number was made in late 1922.
A Colt police positive special with that serial number was made in 1964.
The police positive special list I have shows a D before your listed serial number. If that is the case then it was made in 1968.
A Colt police positive special with that serial number would be 89 years old . It was made in 1922.